Gives Isaac a Dumpy as a familiar, which very loosely follows Isaac. If Lil Dumpy gets hit (either by contact damage, enemy shots, or explosions), it makes one of the following farts and flies in a random direction.
A normal fart that pushes nearby enemies and enemy shots away.
A normal fart that deals 3 damage to and stuns nearby enemies.
A poisonous fart that deals 5 damage to and poisons nearby enemies.