Dirt Rat

Whenever Dirt Rat attacks, each opponent loses 1 life and you gain 1 life.
{3}{b}, Discard a card: Put Dirt Rat from your graveyard onto the battlefield.
The Dirt Rat is weak, small and cowardly. It survives only on the merits of its persistence.
-Report on the origin and characteristics of Dirt Rats to the Azorius Senate.