How the Catalyst works
Catalyst exchanges collection depth for one stronger-level result. Because the five source cards leave the playable event collection, the important decision is not only whether fusion is possible, but whether those exact cards are expendable.
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Five eligible cards of exactly the same level
A fusion requires five distinct cards owned by the player in the selected event, all at the same level. Cards explicitly locked out of Catalyst or attached to an active auction cannot be selected.
The interface offers source levels 0 through 6 because the resulting ordinary level is the source level plus one, capped at level 7. Server validation repeats the ownership, event, count, and level checks before changing cards.
- Select exactly five cards, not five copies of an identifier.
- Switch to the intended event before choosing the inputs.
- Unlock only cards you have deliberately marked as expendable.
One event-compatible result
The ordinary result is an available next-level card. Ascension strictly uses the player’s assigned race; outside Ascension, Catalyst first favors event races but can broaden the pool when no eligible result exists. Source levels 0 and 1 can also produce an Abnormality.
The result depends on the available generated card pool; Catalyst does not let the player choose an exact card name, bonus, or statistics. If no valid card is available, the operation returns an error instead of silently producing an invalid card.
- Expect a level outcome, not a chosen card identity.
- Ascension’s assigned race is strict; other events may use a fallback pool only when necessary.
- Level 7 is the maximum ordinary progression level.
What happens to the five source cards
Source cards are removed from current-event decks before the exchange completes. At source levels 0 and 1, ordinary unprotected records return to the unassigned pool; from level 2 upward, they are consumed. Cards needed for ended-event history, achievements, or avatars can be preserved as records while losing the current-event association.
That handling protects public history but does not make the source card playable after fusion. From the player’s perspective, all five inputs leave the current event collection and must be replaced in any affected active deck.
- Inspect the deck marker on every source card before confirming.
- Rebuild any deck that loses one of the five inputs.
- Do not confuse historical preservation with continued ownership in the event.
When a higher level is not automatically better
Five useful cards can support multiple decks, quests, or race combinations; one random higher-level result may support only one. Catalyst is strongest when the inputs are genuine surplus and the collection still has enough cards to maintain its active plans.
A result above level 2, 3, or 4 also changes eligibility for Rare max, Very Rare max, or Epic max rankings. Check the intended category before exchanging a carefully capped group.
- Remove a card from its deck before locking it; the lock endpoint refuses cards still assigned to a deck.
- Prefer surplus groups that do not erase a required race or bonus role.
- Open pending boosters first; they may change both the input group and the best replacement.