Belly Jelly

Belly Jelly is a passive item added in The Binding of Isaac: Repentance.

Effects

 * Enemies that touch Isaac will bounce off him and propel in the opposite direction. If they hit an obstacle or wall while bouncing, they will take damage.
 * If an enemy bounces into another enemy, the second enemy will also take damage.
 * When an enemy bounces off of Isaac, there's a 50% chance that Isaac won't receive contact damage.
 * Additionally grants a 50% chance for projectiles to bounce off of Isaac without taking damage.

Synergies

 * : Retains the chance to bounce enemies while preventing damage simultaneously.
 * / : Can be used as a powerful offensive item since Isaac can still bounce off enemies while invincible.
 * / / : Offers an additional chance to negate damage.
 * : The bouncing effect works while Isaac is invincible.
 * Panic Button: The active item will still be activated if Belly Jelly blocks damage.
 * : Allows Isaac to bounce enemies and poison them at the same time, with a decent chance to get a lot more health back in the form of Black Hearts than originally spent.

Seeds
CZBW A9HJ (Treasure Room adjacent to spawn)