Attune (While this character is active, when you use an action die, deal 1 damage to target player or character die.)
While Yuan-ti Pureblood is active, when you purchace an action die, trigger the Attune ability of all active character dice.
My opponent and I both have a level 1 SR Yuan-Ti Pureblood fielded. On their turn, my opponent buys an action die, triggering their Yuan-Ti's attune ability and mine (presumably simultaneously). They direct their damage to my Yuan-Ti and KO her. Does my Yuan-Ti still get to do her damage?