Triskelatron

•Triskelatron enters the battlefield with six +1/+1 counters on it. Remove a +1/+1 counter from a creature you control: Triskelatron deals 1 damage to target creature or player. Whenever a creature dealt damage this way this turn dies, create a 1/1 Triskelatron token. It has "Whenever a creature an opponent controls dies, put a +1/+1 counter on this creature".