The Gravemind, flood king

Trample, Delve, Infect
Whenever a Creature you control dies, put two 1/1 black and green corrupted saproling that gets +X/+X where x is half that creatures power.
Whenever a creature an opponent controls dies that opponent creates 2 X/X green corrupted corpse creature token where x is that creatures Power, with " this creature can't attack you, or block creatures you control."