Whenever Sludge Monster enters the battlefield or attacks, put a slime counter on up to one other target creature. Non-Horror creatures with slime counters on them lose all abilities and have base power and toughness 2/2.
NM-Mint Foil - $4.30
Lightly Played Foil - $3.80
Moderately Played Foil - $3.40
Heavily Played Foil - $3.00
Damaged Foil - $2.20
NM-Mint Foil Non English - $4.30
Lightly Played Foil Non English - $3.80
Moderately Played Foil Non English - $3.40
Heavily Played Foil Non English - $3.00
Damaged Foil Non English - $2.20