Lorwyn

Boggart Mob

Champion a Goblin (When this comes into play, sacrifice it unless you remove another Goblin you control from the game. When this leaves play, that card returns to play.)
Whenever a Goblin you control deals combat damage to a player, you may put a 1/1 black Goblin Rogue creature token into play.

Champion a Goblin (When this enters, sacrifice it unless you exile another Goblin you control. When this leaves the battlefield, that card returns to the battlefield.)
Whenever a Goblin you control deals combat damage to a player, you may create a 1/1 black Goblin Rogue creature token.