MAGIC: THE GATHERING
Whenever a nontoken creature is put into your graveyard from the battlefield, if Bridge from Below is in your graveyard, put a 2/2 black Zombie creature token onto the battlefield.
When a creature is put into an opponent's graveyard from the battlefield, if Bridge from Below is in your graveyard, exile Bridge from Below.
This bizarre enchantment is the cornerstone of the "Dredge" deck. If it is dredged into your graveyard it becomes a powerful zombie maker, especially when coupled with sac outlets like Cabal Therapy and Dread Return.