Kaiden Sellsword

When Kaiden Sellsword enters the battlefield, destroy target creature that was dealt damage this turn.
Sacrifice a creature: Kaiden Sellsword has +2/+2 until end of turn. Activate this
ability only once per turn.
'These hulking, fearless mercenaries, said to hail from the mountaintops of the wintry north, are adept at fighting on horseback.'