Sort by:
'When this creature enters, target opponent discards a card.
'Swarm of Rats's power is equal to the number of Rats you control.
'{X}: This creature deals X damage to each creature and each player. Spend only black mana on X.
'When this creature enters, each opponent discards a card.
'Swarm of Rats's power is equal to the number of Rats you control.
'{X}: This creature deals X damage to each creature and each player. Spend only black mana on X.
'Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
'This creature gets +1/+1 for each other creature on the battlefield named Relentless Rats.
A deck can have any number of cards named Relentless Rats.
'At the beginning of combat on your turn, if you both own and control this creature and a creature named Midnight Scavengers, exile them, then meld them into Chittering Host.
'This creature gets +1/+1 for each other creature on the battlefield named Relentless Rats.
A deck can have any number of cards named Relentless Rats.
'This creature can't be blocked by Walls.
'Whenever a creature you control enters, if it has one or more oil counters on it, put an oil counter on it. Creatures you control with oil counters on them...