Elvish Cannibal

Sacrifice an Elf: Put 2 +1/+1 counters on Elvish Cannibal.
If Elvish Cannibal has power 5 or greater, it has lifelink.
If Elvish Cannibal has power 10 or greater, it has trample.
If Elvish Cannibal has power 15 or greater, it has consume. (Whenever a creature is sacrificed as a cost for an ability on a creature with consume, exile it. This creature gains all activated, triggered, and static abilities of the exiled creature.)