Black Sludge

{1}{b/g}, If "Black Sludge" is in the graveyard, target creature gets +0/+X where X is the number of creature-Ooze spells in the graveyard with
a different name until the end of the turn
(This effect can only be used once per turn)
—
Wandering the abyss these slimes weak alone
but have strength in numbers