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Added in Repentance

Mercurius is a passive item added in The Binding of Isaac: Repentance.

Effects[edit | edit source]

  • +0.4 speed up.
  • Opens most doors after entering a room, even in rooms with enemies, allowing Isaac to leave at any time.

Notes[edit | edit source]

  • While Door Stop Door Stop has a similar effect, Mercurius has the added benefit of opening the doors that Isaac did not enter through.
  • Does not open the Boss Rush door.
  • Does not open any special rooms, including those that require pickups to unlock. Doors won't be opened even if they were open already (such as Treasure Rooms and Shops on the first floor, Sacrifice Rooms, etc.) or have been entered before.
  • Does not open doors to 15►Red Key Red Key or Cracked Key Cracked Key rooms if that door was created while there are enemies inside.

Synergies[edit | edit source]

In-game footage[edit | edit source]

Seeds[edit | edit source]

PC Hard mode only 0FYV B9EG (Planetarium adjacent to spawn)

PC Hard mode only D771 QQNR (Planetarium adjacent to spawn)

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