Godrick, the Grafted

Trample, Menace, Haste
When Godrick, the Grafted enters the battlefield, you may sacrifice any number of creatures. For each creature sacrificed this way, Godrick, the Grafted gets +2/+2 until end of turn.

At the beginning of each combat phase, you may pay {1}{g}. If you do, put a +1/+1 counter on Godrick, the Grafted. Then, if Godrick has three or more +1/+1 counters on him, he gains lifelink until end of turn.