Plague Rats [Beta Edition] Magic 2010 (It can deal excess combat

(It can deal excess combat damage to the player or planeswalker it's attacking

Set: Fifth Edition Type: Artifact Rarity: Rare Cost: {1} Mana Vault doesn't untap during your untap step

but I didn't expect it from the building itself

If two or more creatures are tied for least power

Set: Beta Edition Type: Artifact Rarity: Rare Cost: {0} {T}: Add {W}

Plague Rats [Beta Edition] Magic 2010 (It can deal excess combatSet: Beta Edition Type: Creature Rat Rarity: Common Cost: {2}{B} Plague Rats's power and toughness are each equal to the number of creatures named Plague Rats on the battlefield. "Should you a Rat to madness tease Why ev'n a Rat may plague you" Samuel Coleridge, "Recantation"