Thunderjaw

trample, vigilance, haste.
whenever this creature attacks, put 3 {e} on it.
remove one {e} from this creature, it gains (+1/+1)
until end of turn.(use this up to 3 times per turn.
{t}: remove 3 {e} from this creature, it deals 3 damage
to any target. If it's a creature, tap it.
{t}:remove 6 {e} from this creature, deal 3 damage to
each creature your opponents control.