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'This creature can't be blocked by Walls.
'Plague Rats's power and toughness are each equal to the number of creatures named Plague Rats on the battlefield.
'Trample
This creature enters with X +1/+1 counters on it, where X is the total life lost by your opponents this turn.
The adventure continues with the premium HeroQuest Joe Manganiello’s The Crypt of Perpetual Darkness Quest Pack! Zargon’s minions are at your doorstep, threatening the place you call home. Armed only...
'Swarm of Rats's power is equal to the number of Rats you control.
'Return X target creature cards from your graveyard to your hand. You lose X life.
'Shadow (This creature can block or be blocked by only creatures with shadow.)
Whenever this creature deals combat damage to a player, each player discards a card.
'{T}, Collect evidence 3: Add one mana of any color. Put an unlock counter on this artifact. (To collect evidence 3, exile cards with total mana value 3 or greater...
'Return from your graveyard to the battlefield any number of target creature cards that each have a different mana value X or less.
'When this creature enters, target opponent discards a card.
'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.