Binding of Isaac: Rebirth Wiki

Added in Repentance

Forgotten Lullaby is an unlockable trinket added in The Binding of Isaac: Repentance.


  • Doubles the rate of fire of Isaac's familiars.
    • Familiars with charged shots will have their charge time halved. The recovery time between shots is not affected.
    • This will double Lilith's fire rate since her tears come from an Incubus familiar.
  • Does not affect wisps.

In-game footage[]


  • This trinket was originally called Song of the Siren in Antibirth.
  • Forgotten Lullaby, the trinket's new name in Repentance, is also the title of the secret room theme in Mudeth's original soundtrack for the Antibirth mod.