Yanfei: Right of Final Interpretation

"When it comes to cards... Well, anything is permissible, so long as the rules don't forbid it."

Right of Final Interpretation

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(Passive) After this character takes DMG: If this character has no more than 7 HP, they gain 1 $[K310]. (Once per Round)

Source: Reward for inviting Yanfei to a duel at The Cat's Tail and achieving all corresponding challenge objectives