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'Toxic 1 (Players dealt combat damage by this creature also get a poison counter.) When this creature enters, you may return another permanent you control to its owner's hand. If...
'{3}{W}, {T}: Tap target creature.
Corrupted — {W}, {T}: Tap target creature. Activate only if an opponent has three or more poison counters.
'Toxic 1 (Players dealt combat damage by this creature also get a poison counter.) Other Rats you control have toxic 1. When Karumonix enters, look at the top five cards...
'Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) Whenever a source deals damage to this creature,...
'Menace, Lifelink, Toxic 2 Quest Compleated Beast can't be blocked by tokens. Your opponent can't gain life or remove poison counters. Whenever Quest Compleated Beast deals combat damage to an...
'Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.) Whenever a creature dealt damage by Rot Wolf...
'Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
'Flying Toxic 1 (Players dealt combat damage by this creature also get a poison counter.) When this creature enters, another target creature you control with toxic gets +1/+1 and gains...
'Toxic 1 (Players dealt combat damage by this creature also get a poison counter.) When this creature enters, exile target artifact or creature an opponent controls with mana value 3...
'{T}: Add one mana of any color.
Corrupted — Whenever this artifact becomes tapped, each opponent who has three or more poison counters loses 1 life.
'First strike
Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
'{T}: Add one mana of any color. You get two poison counters.