Thrill Seeker Baloth

Adrenaline (Whenever this creature is dealt damage, put a charge counter on it. At the beginning of your end step, if this creature is untapped, remove a charge counter from it.)
Thrill Seeker Baloth gets +1/+1 for each charge counter on it.
{2}: Thrill Seeker Baloth fights another target creature.
He doesn't know what adrenaline is, but he knows it makes him feel good.