Binding of Isaac: Rebirth Wiki

Added in Repentance

Bird Cage is an unlockable passive item added in The Binding of Isaac: Repentance.


  • Gives Isaac a fat bird familiar that sits on Isaac's head until he takes damage.
  • Upon taking damage, it will jump off of Isaac's head and land on the nearest enemy, dealing damage and creating a rock line in a random direction. For the rest of the room, it acts like Dead Bird Dead Bird, flying around, albeit slower, and dealing contact damage to enemies.
    • Bird Cage does 45 damage to enemies it lands on and 10 damage per rock wave that hits enemies, then does 3 contact damage per tick while chasing enemies (9 damage per second). The rock waves can destroy obstacles.


  • If damage is taken in a room with no enemies, the familiar will directly go to the flying phase without performing the jump attack.
  • Contact damage can be dealt to nearby enemies even when the familiar jumps off of Isaac's head.
  • While the familiar is sitting on Isaac's head, it can be affected by certain character appearances. For example, it will appear fully black if obtained by Tainted Judas Tainted Judas.


  • BFFS! BFFS!: Spawns 4 rock waves in an X pattern and doubles contact damage. Damage of the jump and the rock waves is unaffected.
  • Sacrificial Altar Sacrificial Altar: Can be used after the familiar has jumped.
  • Spin to Win Spin to Win: Boosts the familiar's damage while spinning, although has no effect on its speed.


  • Bird Cage Bird Cage: Multiple copies of the item provide no benefit and won't make more than one familiar appear.
  • Box of Friends Box of Friends: Immediately makes the familiar jump, leaving a ghost copy on Isaac's head until he takes damage. This has no benefit to the damage dealt and will not spawn more than one familiar.

In-game footage[]


  • The item's name is a pun: the familiar resembles the Cage boss, and it functions like Dead Bird, thus making it a "Bird" version of the Cage.