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.
Near Mint - $0.60
Lightly Played - $0.60
Played - $0.50
Heavily Played - $0.40
Damaged - $0.30
Near Mint Non-English - $0.60
Lightly Played Non-English - $0.60
Played Non-English - $0.50
Heavily Played Non-English - $0.40
Damaged Non-English - $0.30