Mercurius is a passive item in The Binding of Isaac, added in the Repentance DLC.

+0.4 speed.

Opens all normal doors after entering a room, along with the door Isaac came from. This allows Isaac to leave at any time without completing the room.

Does not open doors that require pickups to unlock, such as Treasure Rooms, Shops, etc.

Cannot open the Boss Rush door.

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.

Mercurius can be found in the following item pools:

The following tags are applied to this item:

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