Keqing: Thundering Penance

As long as you're not actually cheating, this is just the name of a card.

Thundering Penance

3

(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 Keqing to a duel at The Cat's Tail and achieving all corresponding challenge objectives