▾Table of Contents▾
Dad's Key item
Dad's Key is an unlockable active item in The Binding of Isaac.
Description
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.
Note
This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this item for the previous Repentance version, check this page instead.
How to unlock?
Pick up both Key Pieces from the Angels in one run.
Item pools
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
|
Tags
The following tags are applied to this item:
| Id | Description |
|---|---|
| offensive | Can appear for  Tainted Lost. |
Special synergies
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. |
* Note that not all possible synergies and interactions are listed here.
External links
- Check out the item description on the external Isaac Wiki.
Sacrificial Dagger 
Mitre 
Rainbow Baby 
Stem Cells 
Portable Slot 
Holy Water