Ulwarnor, Help of Nature

Trample, Hexproof
Graft 4 (This creature enters the battlefield with four +1/+1 counters on it. Whenever another creature enters the battlefield, if this creature has a +1/+1 counter on it, you may move a +1/+1 counter from this creature onto that creature.)
Whenever Ulwarnor, Help of Nature attacks, proliferate. Then, you may draw a card for each creature that gained a counter this way.