Qua, God of Memories

As long as your devotion to blue and black is less
than 5, Qua, God of Memories isn't a creature.
At the beginning of your end step, if a creature
died this turn, create a 2/2 blue Zombie
creature token, then if a single Zombie you
control has dealt 10 or more damage to a player
this turn, that player loses the game.