Argivian Zealot

Haste, Resist Black and Blue (Prevent all damage from a black or blue source dealt to this creature.)
Assault (Whenever this creature attacks, you may remove this creature from combat and have it fight target creature. If you do, that creature can't block this turn.)
Bloodlust (Whenever this creature attacks, put a+1/+1 counter on it. At the beginning of your end step, if it didn't attack this turn, remove a +1/+1 counter from it.)