Vigean Omnivore

Graft X (This creature enters the battlefield with
X +1/+1 counters on it where X is the amount
of mana spent to cast it. Whenever another creature enters the battlefield, you may move a +1/+1 counter from this creature onto it.)
{t}: Move any number of +1/+1 counters
from any target creature onto another target creature with the same controller.