Yveltal, the Deathbringer

Flying, menace.
You may exert Yveltal, the Deathbringer as it
attacks. If you do, it deals 2 damage to any target.
Whenever a creature dealt damage by Yveltal
this turn dies, you may put a +1/+1 counter on
Yveltal. If you do, it gains trample and indestructible until end of turn.
Legend of Kalos and counterpart to Xerneas.