Elena,Tyrant Killer

+2: All creatures you control have +2/+2 and deathtouch until end of turn. Creatures destroyed this turn cannot be rengenerated.
-3: Exile, Elena, Tyrant Killer from the game this turn. At your next upkeep, return target planewalker to the battlefield under your control.
+10: Deals 4 damage to each creature an opponent controls. If target opponent has no creatures on the battlefield, player takes 5 damage instead.