Your Soul is an unlockable trinket in The Binding of Isaac, added in the Repentance DLC.

Can be used in exchange for a Devil Deal or other item that costs heart containers.

Using it will destroy the trinket.

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 Judas.

The following special synergies and interactions for Your Soul have been documented.

* 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.

Your Soul

• The next purchase that costs health will be free
• The trinket is consumed with the purchase
• Golden Trinket (without Mom's Box): 10% chance to not consume the trinket
• Mom's Box: 10% chance to not consume the trinket
• Mom's Box + Golden Trinket: 20% chance to not consume the trinket

• Check out the trinket description on the external Isaac Wiki.