Binding of Isaac: Rebirth Wiki

Dad's Key is an unlockable activated item.

Effect[ | ]

  • Upon activation, opens all doors in the current room in almost all circumstances.

Notes[ | ]

  • Dad's Key can open:
  1. Any normal doors that are closed during combat, even on floors that normally disallow this;
  2. Any dоor requiring KeyKeys;
  3. Any door requiring BombBombs to blow open (including Secret RoomSecret Room and Super Secret RoomSuper Secret Room doors);
  4. Challenge RoomChallenge Room and Boss Challenge RoomBoss Challenge Room doors regardless of health total;
  5. The door to the Mega Satan Head ingameMega Satan arena;
  6. The Boss RushBoss Rush door from inside;
  7. The doors of a Mini-Boss RoomMini-Boss Room from inside;
  8. Most Boss RoomBoss Room dоors from inside;
  9. (in Repentance) The MausoleumMausoleum / GehennaGehenna doors without paying the health cost.
  • Dad's Key cannot open:
  1. The Boss Rush door if the timer has already passed 20 minutes;
  2. (except in Rebirth) The door to the room leading to ?????? if the timer has already passed 30 minutes;
  3. Angel RoomAngel Room or Devil RoomDevil Room doors from the outside;
  4. Locked ChestLocked Chests of any kind, or Key Blоcks;
  5. The door of Boss Mom ingameMom's Boss Room from inside;
  6. (in Afterbirth and Afterbirth †) The exit door in Greed mode;
    • Leaving the main room before clearing a set of waves will reset your wave counter, and repeated waves will not drop coins or charge your activated item.
  7. (in Afterbirth † and Repentance) The door to The VoidThe Void during the Boss Hush ingameHush boss fight;
  8. (in Repentance) The flesh door leading to CorpseCorpse;
  9. (in Repentance)A Strange Door A Strange Door.

Synergies[ | ]

  • (in Repentance)Collectible Book of Virtues iconBook of Virtues: Creates wisps in the middle ring. If the wisps touch Locked ChestLocked Chests, Special Room doors, or uncleared room doors, they will unlock and open them, destroying themselves in the process. These wisps can open any locked door they touch, including the door to the Mega Satan Head ingameMega Satan arena, A Strange Door A Strange Door, and the flesh door to CorpseCorpse. Bomb ChestBomb Chests and Mega ChestMega Chests are unaffected. They will also donate to Key MasterKey Masters on touch, destroying themselves in the process. Opening a chest in a Challenge RoomChallenge Room with a wisp will not start the challenge.

Interactions[ | ]

In-game Footage[ | ]

Gallery[ | ]

Trivia[ | ]

  • This item is used in The Family Man (challenge #19) and (in Repentance) Red Redemption (challenge #44), as well as the June 19th curated daily challenge.
  • Dad's Key may be a reference to Isaac's father leaving his mother, as it can be used to escape from almost any conflict.
  • In Wrath of the Lamb, this item was unlocked by beating Boss ??? ingame??? for the first time.
  • The function of this item is very similar to the Magical Key from The Legend of Zelda