AION 2 Arcana progression is easiest to understand as one loop: choose the Transcendence dungeon that drops the card slot or crafting material you need, run the highest stage you can clear efficiently, equip useful Arcana immediately, feed expendable cards or Training Arcana into keepers, extract obsolete cards when their crystal value is more important than enhancement EXP, then use Arcana crafting or transmutation to target the slot, set, or skill package your build is still missing. The expensive mistake is treating each of those menus as a separate system.
Arcana matters because it contributes item level, combat stats, set effects, and skill levels at the same time. That makes a well-rolled lower-grade card useful long before you own a perfect Unique card, especially when it completes a set or pushes a core skill toward an important specialization breakpoint. This guide therefore prioritizes a complete usable Arcana board first, skill and set synergy second, and expensive crafted perfection last.
AION 2 Arcana Cycle: Tier to Card to Craft
The entire system can be reduced to six decisions. Transcendence determines which reward family you are farming. The card drop determines whether you equip it. Enhancement determines whether you invest EXP into it. Extraction determines whether an obsolete card becomes crafting material. Transmutation or crafting then converts the correct crystal family into a more targeted Arcana result.
| Step | What you decide | Best default action | What wastes progress |
|---|---|---|---|
| 1. Pick Transcendence | Which dungeon and stage matches the Arcana slot or crystal family you need | Farm the highest efficient stage of the correct dungeon | Running a harder dungeon that drops the wrong family |
| 2. Evaluate the card | Grade, set effect, stats, skill rolls, and whether the slot is empty | Equip a useful upgrade immediately | Leaving slots empty while waiting for perfect Unique cards |
| 3. Feed / Enhance | Whether the card deserves Arcana EXP | Use Training Arcana on cards you expect to keep | Enhancing every temporary card equally |
| 4. Extract | Whether an obsolete card is worth more as crystal progress than EXP | Check the extraction preview before destroying it | Feeding a card from a crystal family needed for your craft |
| 5. Craft / Transmute | Which slot, set, and selectable option justify expensive materials | Target the current build's missing high-value card | Crafting a prestigious card before knowing the desired skills |
| 6. Repeat | Which slot now gives the largest real gain | Return to the dungeon/material family that fixes that bottleneck | Continuing one farm after its useful Arcana slots are already solved |
The order matters because Arcana is not a simple rarity ladder. A card can be valuable because it fills an empty slot, completes a two- or four-piece set, adds levels to a core skill, or provides the stat package your role needs. A higher grade increases its baseline value, but it does not erase bad synergy.
Global Launch vs KR/TW Arcana: Keep the Versions Separate
The detailed Arcana system available today comes from the Korean and Taiwanese live services. AION 2 Global has not launched yet. The official AION 2 Global site schedules full launch for October 5, 2026, with 5-Day Advanced Access beginning September 30 for eligible Founder’s Pack owners. Before release, the Launch Scale Test is scheduled for September 17–18, with pre-download beginning September 16.
That means the current KR/TW Arcana slots, Transcendence dungeon roster, item-level gates, stage counts, Odyle Energy costs, extraction rules, and synthesis recipes are useful mechanical references but are not automatically confirmed as Global day-one values. NC has not confirmed that Global will launch on the same content snapshot as the current KR/TW services.
The durable part of this guide is the decision loop: identify the right reward family, fill usable slots, feed keepers, extract obsolete cards only when the crystal is more valuable, and craft once the desired skill or set is known. When Global opens, use the live Global client for the exact dungeon stages and material costs.
Players who want the underlying campaign and system unlocks completed before concentrating on Arcana can use an AION 2 Campaign route where applicable. Arcana optimization only becomes meaningful after the character has opened the progression content that supplies it.
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How Transcendence Tiers Feed Arcana Progression
Transcendence is the main PvE lane tied to Arcana, but the word "tier" can be misleading. It is not one universal Stage 1-to-10 ladder shared by every Transcendence dungeon. Earlier KR/TW content used longer stage ladders reaching Stage 10, while current Chapter 1 dungeons such as Abyssal Horn Den and Noiran's Hidden Legacy use their own Stage 1–4 structures and reward families.
Run the Correct Dungeon Before Chasing the Highest Stage
Your first question should be "Which Arcana slot or crystal family does this dungeon provide?" rather than "What is the highest Transcendence stage I can enter?" Sunken Temple of Life introduced the Scales slot and Harmonious Crystal. Mirror of Scarlet Desire introduced newer sets and Noble Crystal. Chapter 1 added more Arcana slots and newer Transcendence families. Noiran's Hidden Legacy later became the source for Dice and Lantern cards.
If your missing upgrade is a Scales card, clearing a higher stage in a dungeon that cannot produce the Scales family does not solve the bottleneck. Targeting beats raw difficulty.
Stage Difficulty Should Improve Expected Value, Not Just Prestige
Within the correct dungeon, move upward only while the clear remains efficient. Higher stages can improve reward quantities, card outcomes, or material yields, but a wipe-heavy clear is still poor progression because it costs time and consistency. Odyle Energy is spent when you claim the relevant reward Cube, so judge both the clear and the Cube before committing the resource.
Older community Arcana guides commonly told players to aim for Stage 9 or Stage 10 because those were important points in earlier Transcendence ladders. That advice cannot be copied onto every current dungeon. Noiran's Hidden Legacy and Abyssal Horn Den currently use four stages rather than ten. Treat each Transcendence dungeon separately.
Odyle Energy Is the Current Reward Gate
Chapter 1 changed the dungeon economy. The official July update removed the regular Expedition and Transcendence entry-ticket requirement in KR/TW and moved reward claims to Odyle Energy. Party size also increased to five for those dungeon types.
That makes reward selection more important than simply pushing the highest stage. Spend Odyle Energy on a reward Cube that advances the Arcana slot, Training Arcana supply, or synthesis material you are actively building. A failed attempt mainly costs time; the resource decision comes when you claim the Cube.
If Transcendence clears themselves are the bottleneck, the verified AION 2 Transcendence Dungeons option is directly related to this reward lane. For self-play, the same principle applies: pick the dungeon for its Arcana output before choosing the stage.
Arcana Cards, Grades and Current Slots
Arcana cards have a grade, a slot or part, a set identity, stat effects, and skill-related rolls. Those layers determine whether a card is useful. Current KR/TW Arcana uses Common, Rare, Epic, and Unique grades in the main card progression, but the item level attached to a grade is not fixed forever: newer Arcana generations can use higher item levels than the original launch-era cards.
| Arcana layer | Launch-era KR/TW reference | Practical meaning |
|---|---|---|
| Common | About +20 item-level contribution in the original five-slot system | Use immediately if the slot is empty; do not over-enhance |
| Rare | About +40 | Good early filler when set and stat package are useful |
| Epic | About +60 | Strong progression card and often worth real enhancement investment |
| Unique | About +80 in the original five-slot pool | Long-term target when the skills and set are correct; newer Unique Arcana can have higher item levels |
| Original parts | Chalice, Parchment, Compass, Bell, Mirror | Core launch-era Arcana slots |
| Season 2 addition | Scales | Added with Sunken Temple of Life |
| Chapter 1 additions | Key, Hourglass, Dice, Lantern | Key and Hourglass arrived first; Dice and Lantern followed later |
The +20/+40/+60/+80 values are launch-era references for the original Arcana structure, not universal current values and not a promise for Global. Newer KR/TW Arcana can use different item levels even within the same grade. The evergreen rule is breadth before perfection: an empty slot contributes nothing, while a usable card can provide immediate item level, stats, set progress, and skill levels.
Do Not Confuse Card Grade With Transcendence Tier
These are separate concepts. The Transcendence stage is the difficulty of the dungeon run. The Arcana grade is the quality of the card you obtain. A higher stage can improve the reward pool or chance of stronger cards, but a Stage 4 card is not a special "Tier 4 Arcana" category.
This terminology matters when comparing guides. If one player says "I need a higher Arcana tier," check whether they mean a higher-grade card or a higher Transcendence stage. The upgrade plan is different in each case.
Skill Rolls Can Matter More Than One Grade Step
Unique Arcana can roll multiple class skills, and enhancement can add skill levels to the card's skill package. The best result is therefore not simply the highest-grade card that drops. A well-rolled Epic that pushes a primary skill to an important breakpoint can outperform a badly rolled Unique for the actual build until the Unique is replaced or crafted correctly.
This connects directly with the broader skill system. The existing AION 2 Stigma and Daevanion guide explains how Arcana skill levels stack with direct Mastery, Stigma, Daevanion, and other progression sources when calculating the final skill level.
Equip Arcana First: Fill Slots Before Chasing Perfect Cards
The first Arcana milestone is a complete usable board, not five or ten perfect cards. Early community calculations show why: even the original five Common cards supplied a meaningful item-level gain, while five higher-grade cards scaled that contribution substantially. An empty slot sacrifices both the card's baseline power and any set or skill contribution it could provide.
Use the First Card That Improves an Empty Slot
Do not leave a slot empty because the first drop is Common or Rare. Equip it, use the item level and stats to reach better content, then replace it. Early Arcana is progression gear, not a museum collection.
The exception is enhancement investment. Equipping a temporary card is cheap; feeding a large amount of Training Arcana into it is not. Separate "worth equipping" from "worth enhancing deeply."
Build Set Effects Around Your Role
Arcana sets can provide two- and four-piece effects, so mixing individually strong cards can still be worse than completing a relevant set. Official updates have repeatedly added new set effects: Frenzy and Pure Blood arrived with Scales, while Punishing Overture, Protected Soul, and Indomitable Dedication arrived with Mirror of Scarlet Desire.
Do not copy one universal set ranking across DPS, tank, and healer roles. Boss-oriented damage amplification, Restoration, weapon-damage tolerance, critical damage, and other effects solve different problems. Complete the set whose bonus is active in your main content.
Skill Breakpoints Come Before Cosmetic Perfection
Many current KR/TW build guides treat skill levels around 16 and 20 as common optimization breakpoints, but those targets are class- and skill-specific rather than one universal Arcana rule. A card that contributes the correct skill can therefore be more valuable than one with prettier secondary stats when it completes an important specialization for the active build.
Before replacing an Arcana card, remove it in the build screen and check which core skill level falls. If the swap breaks an important specialization while adding only a small amount of raw item level, keep the old card until the replacement can restore that breakpoint.
Feed Arcana: Enhancement EXP and Training Cards
Enhancement is the "feed" step of the Arcana loop. A keeper card receives Arcana EXP from dedicated Training Arcana and from other materials that the current enhancement interface allows you to register. The correct question is not simply whether a spare card can be used as material; it is whether its enhancement value is better than its extraction or synthesis value.
Training Arcana Is the Cleanest Enhancement Material
Current KR/TW item data lists four dedicated Training Arcana values: Lesser gives 200 Enhance EXP, Intermediate 600, Superior 1,500, and Ultimate 3,000. These exist specifically to be registered as Arcana enhancement materials, making them the safest EXP source to spend on a card you expect to keep.
- Lesser Training Arcana: 200 Enhance EXP.
- Intermediate Training Arcana: 600 Enhance EXP.
- Superior Training Arcana: 1,500 Enhance EXP.
- Ultimate Training Arcana: 3,000 Enhance EXP.
Do not use these numbers as a Global launch guarantee until the Global client exposes the same items. They are useful for understanding the current KR/TW enhancement economy and why higher Training Arcana should be protected for keeper cards rather than temporary filler.
Feed Spare Cards Only After Checking Their Extraction Value
Before using an unwanted Arcana card as enhancement material, check the live enhancement preview. Eligible materials and their EXP value can vary with the card and the current rules, so do not rely on an old same-type or same-family feeding rule from a community guide.
The important decision is simpler: if a spare card belongs to an extraction family that produces a crystal needed for your next targeted craft, extraction can be more valuable than Arcana EXP. If you have no use for that crystal and the keeper card is one enhancement away from a meaningful skill level, feeding may be better.
Extract Arcana When the Crystal Is Worth More Than the EXP
Extraction is one bridge from random drops into more targeted Arcana progression. Instead of using an obsolete card only for enhancement EXP, supported Arcana extraction can convert eligible cards into materials associated with older or newer Arcana generations.
This system has expanded over time. The official May Arcana update states that Season 1 and Season 2 Arcana extraction can produce Mysterious Crystal, while Season 3 Arcana can produce Noble Crystal. The same update added new sets craftable with Noble Crystal.
There Is No Single Universal Arcana Crystal
This is the most important crafting correction for older guides. Mysterious Crystal remains important for older Arcana. Season 2 Scales introduced Harmonious Crystal for their original synthesis path, while later set families use Noble Crystal and, in newer recipes, Splendent Noble Crystal. Chapter 1 synthesis can also use Pure Crystal for specific option-control workflows. These materials do not all come from Arcana extraction, so do not treat every crystal name as one universal extraction family.
Always read the extraction and synthesis previews before confirming. If an obsolete card produces a material you need for the card you eventually want to make, it is not merely "junk." It is part of a targeted progression path.
Do Not Extract Your Only Functional Card
A replacement should already be equipped or ready before you destroy a developed Arcana card. Extraction can accelerate crafting, but losing a two-piece set, four-piece set, skill breakpoint, or item-level requirement can lock you out of the Transcendence stage you were trying to farm.
The safe order is replacement first, extraction second. If the old card has been heavily enhanced, compare the value of preserving it for another loadout against the crystal yield rather than treating every obsolete main-build card as immediate crafting fuel.
Arcana Crafting and Transmutation
Arcana crafting is where the system becomes less random. Depending on the service and current UI label, the relevant workflow may appear as Transmute or Synthesis. It consumes the materials listed for the desired Arcana generation, plus Kina or other required items, to produce a more targeted result.
Crafting Materials Change With the Card Generation
Official updates prove that there is no permanent single recipe for every Arcana card. The original Season 2 Scales synthesis path uses Harmonious Crystal obtained through Sunken Temple of Life. Later sets such as Punishing Overture, Protected Soul, and Indomitable Dedication use Noble Crystal, and subsequent updates added Splendent Noble Crystal recipes for selected newer Arcana parts. Chapter 1 synthesis can also consume Pure Crystal when controlling specific options.
Therefore, do not memorize one old Mysterious Crystal recipe and apply it to every Unique Arcana. Older cards can still use Mysterious Crystal, the original Season 2 Scales path uses Harmonious Crystal, and newer families can require Noble or Splendent Noble materials. Pure Crystal is used in specific Chapter 1 option-selection workflows rather than serving as a universal extraction replacement. The live Transmute or Synthesis preview is the final authority.
Use Selected Skills or Options on the Card That Matters Most
Certain KR/TW Arcana recipes let players spend additional materials to select or lock desired skills or options. The number of controllable options and the Kina or crystal surcharge are card-specific and have changed across updates.
The practical strategy survives those changes: pay the deterministic premium on the slot where a correct skill roll has the greatest effect on your build. Do not spend the largest recipe on a minor utility card while the card responsible for your main damage, healing, or tanking skill remains random.
Natural Drop First, Craft the Missing Piece
Do not craft a complete Arcana set from zero just because the menu allows it. Farm Transcendence first and equip usable natural drops. Crafting is strongest as a missing-piece tool after RNG has already solved several slots.
This dramatically reduces crystal and Kina waste. If three pieces of the desired set already dropped with useful skills, craft the fourth piece or the difficult slot rather than replacing the entire set with slightly cleaner versions.
Best AION 2 Arcana Upgrade Order
The fastest progression order uses cheap breadth first and expensive precision last. It also keeps Transcendence difficulty tied to clear efficiency rather than ego. The following route works as an evergreen framework even if Global launches with fewer Arcana parts than current KR/TW.
- Unlock Transcendence and identify your current Arcana slots. Do not copy the KR/TW ten-slot state into Global until those slots actually exist there.
- Fill every available slot with a usable card. Grade is secondary while a slot is empty.
- Choose one main PvE build. Record the skills, stats, and set effects that directly support its rotation.
- Farm the Transcendence dungeon that drops the needed slot or crystal family. Targeting comes before stage number.
- Run the highest stage you can clear efficiently. A lower stable stage can be better for time efficiency than a higher wipe-heavy stage; spend Odyle Energy only when the reward Cube is worth claiming for your target.
- Protect skill breakpoints and useful set bonuses. Do not replace a card solely for item level if it breaks the build.
- Feed Training Arcana into proven keeper cards. Avoid deep enhancement on temporary Common or Rare fillers.
- Compare every spare card's feed value with its extraction preview. Feed for immediate enhancement; extract for targeted crafting progress.
- Craft the hardest missing card. Use deterministic skill or option selection where the premium produces a real rotation gain.
- Only then refine secondary stats and perfect rolls. Perfection is the final stage, not the entry requirement.
The route prevents the two most expensive Arcana errors: investing all Training Arcana into the first high-grade card that appears and extracting cards indiscriminately before understanding which crystal family the future craft requires.
Arcana Priorities for DPS, Tank and Healer Builds
The universal upgrade order still needs role-specific interpretation. A card that is best for a boss-DPS build can be mediocre for a Templar holding difficult content or a Cleric whose group fails because Restoration is too low. Use Arcana to improve the job your character is expected to perform.
DPS Priority
Start with the cards that increase levels on the active skills and passives driving the main boss rotation, then complete a damage-oriented set whose conditions remain active in real encounters. Boss damage amplification, critical-related effects, and relevant offensive stats become valuable only after the rotation itself is functional.
If a lower-grade card provides the exact core skill and a Unique does not, keep the lower-grade card until the replacement can preserve the breakpoint. Damage lost from a broken specialization can exceed the item-level gain shown on the character sheet.
Tank Priority
Prioritize the skill package that maintains threat, mitigation, survival, and reliable control. Defensive set effects can be more valuable than a small offensive gain when the next Transcendence stage fails because the tank cannot survive the boss pattern.
Item level still matters for dungeon entry, but entry does not equal clear capability. Upgrade the Arcana card that fixes the actual survival or skill-uptime bottleneck before crafting a damage card for a faster parse.
Healer and Support Priority
Healers should prioritize the skill levels and set effects that improve reliable group healing, Restoration, emergency recovery, or the support effects required by the party. Protected Soul is an example of a later Arcana set explicitly built around Restoration rather than generic personal damage.
Support builds also benefit from keeping alternative cards rather than extracting everything outside the solo-DPS setup. A card that looks weak while questing can be valuable in five-player Transcendence when it improves the exact group skill you need.
Arcana Mistakes That Slow Progress
Most Arcana stalls are not caused by low drop luck alone. They happen because cards are enhanced, fed, extracted, and crafted without one target build or material plan. The fixes are procedural.
- Leaving slots empty while waiting for Unique cards: use a lower grade and take the immediate item-level, stat, set, and skill value.
- Calling every dungeon stage a universal Transcendence tier: current dungeons have different stage structures and reward families.
- Farming the highest stage in the wrong dungeon: first identify which Arcana slot or crystal you need.
- Forcing unstable clears just because the stage number is higher: wipes cost time, and Odyle Energy should be spent only when the resulting reward Cube fits your target.
- Enhancing every card evenly: Training Arcana belongs on cards with useful skills and a realistic lifespan.
- Feeding cards without checking extraction: the lost crystal progress may be more valuable than immediate Arcana EXP.
- Extracting a card before equipping a replacement: you can break a set, skill breakpoint, or item-level gate.
- Assuming all Arcana extracts into Mysterious Crystal: later generations use different extraction and synthesis materials.
- Memorizing one old crafting cost: material families, selectable options, and Kina costs changed across seasons.
- Crafting before choosing a skill target: deterministic crafting is most valuable when you already know which roll is worth paying for.
- Chasing grade instead of skill synergy: a correct lower-grade card can temporarily outperform a bad Unique for the build.
- Breaking an important skill specialization for a small item-level gain: many current builds care about class-specific breakpoints around 16 or 20, but check the exact skill rather than treating those numbers as universal.
- Building only solo damage on a tank or healer: group Transcendence rewards role performance, not only personal DPS.
- Copying KR/TW slot counts into Global launch guides: use the Global client for the actual day-one content snapshot.
If item level rather than Arcana quality is blocking access to the next progression bracket, the existing AION 2 Gear Progression guide separates general equipment gates from card optimization. Arcana is one contributor to progression, not a reason to ignore weapon, armor, accessories, Stigma, and other systems.
For players who still need level and general progression rather than a specific Arcana fix, the verified AION 2 Power Leveling option addresses the earlier character-progression lane. Do not spend Arcana crafting materials trying to solve a problem caused by an underdeveloped character in every other system.
AION 2 Arcana and Transcendence FAQ
These answers cover the recurring questions behind AION 2 Arcana guide, Transcendence tiers, Arcana cards, extraction, enhancement, and Arcana crafting searches.
What is Arcana in AION 2?
Arcana is a character-growth card system tied closely to Transcendence content. Cards can contribute item level, stats, set effects, and skill levels, then be enhanced, extracted, or used as part of the crafting economy.
Where do Arcana cards come from?
Transcendence is the central source, with different dungeons and stages tied to different Arcana slots, sets, and crystal families. Additional cards and enhancement materials can also appear through other progression rewards and temporary events.
Are Transcendence tiers the same as Arcana card tiers?
No. Transcendence stage is dungeon difficulty. Arcana grade describes the card. Higher dungeon difficulty can improve rewards, but it does not turn cards into a universal numbered tier system.
Should I always run the highest Transcendence stage?
Run the highest stage of the correct dungeon that you can clear efficiently. A lower reliable clear can be better for time efficiency than a higher wipe-heavy stage. Spend Odyle Energy when the reward Cube is actually useful for the Arcana target you are farming.
How many Arcana slots are there?
Current KR/TW live progression has expanded beyond the original five parts with Scales and later Key, Hourglass, Dice, and Lantern. NC has not confirmed that Global will launch with the complete current KR/TW slot roster.
Should I equip a Common or Rare Arcana?
Yes if the slot is empty or the card provides a useful skill, stat, or set effect. Replace it later; do not leave free power unequipped while waiting for a perfect Unique.
What should I enhance first?
Enhance cards that support your core rotation, preserve important skill breakpoints, and are likely to remain equipped. Avoid spending large amounts of Training Arcana on temporary filler.
How much EXP does Training Arcana give?
Current KR/TW item data lists Lesser at 200, Intermediate at 600, Superior at 1,500, and Ultimate at 3,000 Enhance EXP. Check the Global client after launch before treating those numbers as Global values.
Should I feed or extract an unwanted Arcana card?
Feed it when immediate enhancement EXP is more valuable. Extract it when its crystal family is needed for a targeted craft. Always inspect both outcomes before destroying a valuable card.
What do I get from Arcana extraction?
The output depends on the eligible card and generation. The official May KR/TW update specifically confirms Mysterious Crystal from Season 1/2 Arcana and Noble Crystal from Season 3 Arcana. Other materials, such as Harmonious Crystal used by the original Season 2 Scales synthesis path, follow their own acquisition and synthesis rules and should not be assumed to come from the same extraction table.
Is Mysterious Crystal used for every Arcana craft?
No. Older Arcana can use Mysterious Crystal, the original Season 2 Scales synthesis path uses Harmonious Crystal, and later set or Chapter 1 synthesis can use Noble Crystal, Splendent Noble Crystal, and Pure Crystal for specific recipes or option control. Follow the current Transmute or Synthesis preview for the card you want.
How does Arcana crafting work?
Use the current Transmute or Synthesis interface with the crystal, Kina, and other materials listed for the desired Arcana. Certain recipes allow targeted skill or option selection, making crafting strongest as a way to solve a specific missing card rather than replace every natural drop.
What Arcana should I craft first?
Craft the hardest missing slot whose correct skill or set effect materially improves your main build. Do not craft a low-impact piece while a core damage, tanking, or healing card remains unresolved.
Are skill levels more important than card grade?
They can be. A lower-grade card that reaches an important skill specialization can remain better for the active build than a higher-grade card with irrelevant skills.
Do Arcana skill levels stack with Stigma and Daevanion?
Arcana is one of the systems that can contribute additional skill levels alongside the character's other skill-progression sources. Recalculate the final skill level before replacing a card.
Will Global AION 2 have the same Arcana crafting costs as Korea?
NC has not confirmed the complete Global day-one Arcana roster, stage gates, extraction tables, or synthesis costs. Use KR/TW as the mechanical reference and the Global live client as the final authority after October 5, 2026.
Conclusion
AION 2 Arcana progression becomes much easier once you stop treating Transcendence, cards, enhancement, extraction, and crafting as separate grinds. Choose the dungeon for the slot or crystal family you need, run the highest stage that remains efficient, fill every available Arcana slot, protect useful set and skill breakpoints, and feed Training Arcana only into cards with a realistic lifespan. When a card becomes obsolete, compare enhancement EXP against extraction before destroying it.
Crafting should finish the build rather than start it. Let natural Transcendence drops solve as many slots as possible, extract cards only when the output supports your target, then spend expensive crystals and Kina on the missing card whose selected skill or set effect produces the largest real gain. For Global, keep the same upgrade order but re-check every exact stage, slot, material, and cost after launch; the current KR/TW system is the best mechanical reference, not a guarantee that October 5 begins on the identical content snapshot.
