The Oreginaetor

Sap (Place a -1/-1 counter on each creature that
blocks or is blocked by this creature. For each
counter placed this way, put a +1/+1 counter on
this creature.)
At the beginning of your end step, you may
remove a +1/+1 counter from any number
of other creatures you control. For each
creature you remove a counter from in this
way, create a token that's a copy of that creature.