The Timbertitan

Delve (Each card you exile from your graveyard
while casting this spell pays for {1}.)
Flying, trample, vigilance, martyr (You may
sacrifice this creature at any time to give it's keyword abilities to target creature until end of turn.)
When The Timbertitan enters the battlefield,
put eight +1/+1 counters on target creature.
Partner (You can have two commanders if both have partner.)