Lich Ascendant

Whenever a non-token creature you control dies,
Amass 1 (Put one +1/+1 counters on an Army you
control. If you don't control one, create a 0/0
black Zombie Army creature token first.).
Exemplar -- As long as you control no other
creature named Lich Ascendant, this creature has
"{t}: Zombies you control gain persist until end
of turn."