Grunus, the Brave

Exalted 2 (Whenever Grunus, the Brave attacks
alone, it gets +2/+2 until end of turn.)
Momentum 2 (Whenever Grunus, the Brave deals damage, put two +1/+1 counters one it.)
Barbaric (Each time Grunus, the Brave deals
combat damage to player, put a barbaric counter on it,
then multiply the damage dealt times the number of barbaric counters on it.)