Isaac Rebirth

Blue Baby's Soul (actually known as ???'s Soul) is a trinket added to The Binding of Isaac: Rebirth. It appear as a little ghost similar to ???.

It is unlocked after beating The Dark Room level with ???.


  • Spawns the nearly visible Brother Bobby-like familiar that floats slowly around the room on a zig-zag pattern similar to The Peeper.
  • Fires spectral and homing tears.

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