Strange Key - The Binding of Isaac

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Strange Key is an unlockable trinket in The Binding of Isaac, added in the Repentance DLC.

Unlocks the passageway to Blue Womb regardless of the run's duration.

Using Pandora's Box while holding the trinket will ignore the regular effects of the box, and instead spawn 6 higher quality items from a set of item pools, consuming both the item and trinket in the process.

The items are chosen from the following pools: Treasure Room, Shop, Boss, Devil Room, Angel Room, Secret Room, Library, Golden Chest, Curse Room, Planetarium.

The Treasure Room pool has a much higher chance to be chosen than the others that have an equal chance.

This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this trinket for the previous Repentance version, check this page instead.

Defeat Isaac, ???, Satan, and The Lamb as Tainted Eve.

The following tags are applied to this trinket:

Id	Description
lazarussharedglobal	Passive effects (except direct stat changes) are shared between Tainted Lazarus' forms.

The following special synergies and interactions for Strange Key have been documented.

Mod	Item	Synergy
---	Trinket multipliers	Can open all doors and chests in Blue Womb. Opening Pandora's Box will spawn +2 items per multiplier.

* Note that not all possible synergies and interactions are listed here.

Below is the Internal Item Description as shown in-game.
Note that some stat changes are not displayed here. Please see the main description for the full effects.

Strange Key

• The door to ??? will open regardless of the timer
• Golden Trinket (without Mom's Box): Can be used to open all locked chests and doors in ???
• Mom's Box: Can be used to open all locked chests and doors in ???
• Mom's Box + Golden Trinket: Can be used to open all locked chests and doors in ???
• Opening Pandora's Box will consume the key and replace its rewards with 6 items from random pools
• Golden Trinket (without Mom's Box): Opening Pandora's Box will consume the key and replace its rewards with 8 items from random pools
• Mom's Box: Opening Pandora's Box will consume the key and replace its rewards with 8 items from random pools
• Mom's Box + Golden Trinket: Opening Pandora's Box will consume the key and replace its rewards with 10 items from random pools