Necrabe

{4}: Put an Assimilation counter on target creature
(Creatures with an Assimilation counter count as Mandiblors you control in addition to their other creature types. Mandiblor creatures you control
cannot be counted twice with this effect).
If a creature would enter the battlefield from the graveyard, exile it instead. If a creature is exiled
this way, you gain {w}{w}, {g}{g} or {w}{g}