Gravemind, Corpse Collector

Mutants you control gain "at the end of your
turn create a 0/1 mutant Biomass Cell with
"can't attack or block and enters the battlefield
tapped and {t}: Create a token copy of Biomass
Cell Sacrifice 8 creatures named Biomass Cell:
create a 2/2 mutant creature token called
"Biomass Basic Combat Form" with "whenever
this creature destroys another creature, create
a X/X mutant creature token called "Purecombat
Form" where X is the destroyed creature's
toughness."