Gravebreaker Primodial

Flying, trample, haste
Whenever Gravebreaker Primodial enters the battlefield, sacrifice it unless you pay {g}
—At the beginning of your combat phase, if Gravebreaker Primodial is in your graveyard,
you may exile six cards from any graveyard and
return it to the battlefield tapped and attacking.
If you exiled at least six creatures this way, it
enters the battlefield with six +1/+1 counters
on it.