Bird Cage

ItemRepentanceLocked

familiarGame ID 610★★★★

How do you unlock Bird Cage?

In The Binding of Isaac, Bird Cage is unlocked by earning the Mother completion mark as Eve (Character).

Structured pathSource-backed requirements are mapped into trackable steps.

The first time Isaac takes damage in a room, a familiar leaps on an enemy, dealing damage and releasing a rock wave. For the rest of the room, it chases enemies similar to Dead Bird.

Bird Cage (Achievement)
- Eve (Character) → Mother (normal)
  1. Defeat Hush 3 times to unlock A Secret Exit. source
  2. After A Secret Exit is unlocked, a locked door to Downpour appears after completing Basement/Cellar/Burning Basement I or II. source
  3. Collect Knife Piece 1 in Downpour/Dross II. source
  4. Collect Knife Piece 2 in Mines/Ashpit II. source
  5. After defeating Mom in Mausoleum/Gehenna II, stab the flesh door that appears with the knife familiar to open it. source
  6. Defeat the Mausoleum version of Mom's Heart behind the flesh door, then reach Corpse II and defeat Mother. source
  - Eve (Character)

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What unlocking Bird Cage leads to

Nothing depends on this yet.

Source: bindingofisaacrebirth.wiki.gg

Imported 2026-09-13