Mechanics
X-Cost Card
An X-cost card is usually played last: it spends all your remaining Energy and repeats all of its effects once per Energy spent.
An X-cost card spends all remaining Energy and repeats its effects once per Energy spent. It is usually best played last.
Numbers from the current game data

Soul Strip: Waifu Card Battler
Check cards, relics, and enemies before your next run. Every number comes from game data, and the Steam demo is free.
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