Novak, Master Assassin

(flips into Novar, Barb-God)
Deathtoucch.
{2}: pay 6 life create three 2/2 black human assassin tokens with Deathtouch
whenever a creature dies by an assassin you control exile that card with an assassin counter on it then if there are 10 or more cards with assassin counters exile Novak, Master Assassin and return him to the battlefield transformed into Novar, Birb-God.