Wildmutt

Riot, frenzy 1 (This creature enters with your
choice of a +1/+1 counter or haste. Whenever
this creature attacks and isn’t blocked, it gets
+1/+0 until end of turn.)

Whenever a Dog or Alien you control deals
damage to a player, untap it. You lose 1 life.

"Chill out. I got animal instincts!"