Yahenni, Undying Partisan
Legendary Creature — Aetherborn Vampire, {2}{B}
Oracle Text
Haste
Whenever a creature an opponent controls dies, put a +1/+1 counter on Yahenni.
Sacrifice another creature: Yahenni gains indestructible until end of turn.
Legendary Creature — Aetherborn Vampire, {2}{B}