Riyo Retired Assassin

Giver (If this card is your commander, you may choose a Vital Instrument to be your second commander) When a Creature enters the Battlefield under an opponents control, you may pay {1}{B}: put a Hit counter on that Creature. When Riyo Retired Assassin Fights a Creature with a Hit counter, it gains +0/+3 and has Deathtouch.{/fontsize-17}