Lab Rats

Buyback {4} (You may pay an additional {4} as you cast this spell. If you do, put this card into your hand as it resolves.)
Create a 1/1 black Rat creature token.

Tempest Remastered

Buyback {4} (You may pay an additional {4} as you cast this spell. If you do, put this card into your hand as it resolves.)
Put a 1/1 black Rat creature token onto the battlefield.

Stronghold

Buyback o4 (You may pay an additional o4 when you play this spell. If you do, put it into your hand instead of your graveyard as part of the spell's effect.)
Put a Rat token into play. Treat this token as a 1/1 black creature.