Dad's Key - The Binding of Isaac

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Dad's Key is an unlockable active item in The Binding of Isaac.

Opens all doors in the current room.

It can open:
• any normal door that is closed during combat;
• any door requiring a key/bomb/heart;
• Secret Rooms and Super Secret Rooms;
• Challenge Rooms and Boss Challenge Rooms;
• the door to the Mega Satan arena;
• the Boss Rush door from the inside;
• a mini-boss door from the inside;
• a boss room door from the inside (excluding Mom's room);
• the exit door in Greed Mode.

This page shows information as of the latest Repentance release.
To see latest up-to date information about this item for the new Repentance+ (Online Co-op) DLC, check this page instead.

Pick up both Key Pieces from the Angels in one run.

Dad's Key can be found in the following item pools:

Name	Weight
Treasure Room	1.0/1.0
Key Master	1.0/1.0
Greed Treasure Room	1.0/1.0
Old Chest	1.0/1.0

The following tags are applied to this item:

Id	Description
offensive	Can appear for Tainted Lost.

The following special synergies and interactions for Dad's Key have been documented.

Mod	Item	Synergy
---	Book of Virtues	Spawns wisps in the middle ring. If a wisp touches a Locked Chest or special room door, it will unlock it, destroying itself in the process. These wisps can open any type of door, including ones not normally accessible via Dad's Key. They cannot open Bomb Chests and Mega Chests.