Yahenni, Undying Partisan

Oracle Text

Haste

Whenever a creature an opponent controls dies, put a +1/+1 counter on Yahenni, Undying Partisan.

Sacrifice another creature: Yahenni gains indestructible until end of turn.

Card Rulings

2/9/2017 If Yahenni and a creature an opponent controls die simultaneously (perhaps because they fought or were in combat together), Yahenni won’t be on the battlefield as its triggered ability resolves. It can’t be saved by the +1/+1 counter that would have been put on it.

Additional Information