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 - $279.00
Lightly Played Foil - $251.10
Moderately Played Foil - $223.20
Heavily Played Foil - $195.30
Damaged Foil - $139.50
NM-Mint Foil Non English - $279.00
Lightly Played Foil Non English - $251.10
Moderately Played Foil Non English - $223.20
Heavily Played Foil Non English - $195.30
Damaged Foil Non English - $139.50