Create a 0/0 green Ooze creature token with trample. Put X +1/+1 counters on it, where X is two plus the total number of cards you own in exile and in your graveyard that are Oozes or are named Slime Against Humanity.
A deck can have any number of cards named Slime Against Humanity.
NM-Mint Foil - $242.50
Lightly Played Foil - $218.30
Moderately Played Foil - $194.00
Heavily Played Foil - $169.80
Damaged Foil - $121.30
NM-Mint Foil Non English - $242.50
Lightly Played Foil Non English - $218.30
Moderately Played Foil Non English - $194.00
Heavily Played Foil Non English - $169.80
Damaged Foil Non English - $121.30