Binding of Isaac: Rebirth Wiki
Binding of Isaac: Rebirth Wiki

Added in Repentance

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


  • Adds an extra Secret Room Secret Room and Super Secret Room Super Secret Room to each floor, if possible.
  • Reveals one random Secret Room on the map on pickup and at the start of each floor.
  • Each newly discovered Secret Room has a shining beam of light that will raise tears for the current floor and gives Isaac half a Soul Heart when walked under.
    • The first light gives Isaac +1 tears fired per second, and all subsequent ones give +0.5 tears fired per second.
    • This gives a potential +2.5 tears per second for a given floor, on top of 2 soul hearts.
    • The tears up breaks the default 5 tears per second cap.
  • Once the effect is triggered for the floor, a silver-bluish shine will appear around Isaac. This light will be strengthened for every beam of light "gathered".


  • The beams of light appear in both Secret Room types but not in Ultra Secret Room Ultra Secret Rooms.
    • This includes Secret Rooms and Super Secret Rooms that appear as a result of Red Key Red Key.
  • The beams of light appear even in unopened Secret Rooms on the same floor the item was acquired on.
  • The effect can also be obtained in the Mirrored World.
  • The tears up bonuses still apply while in the special area of Mines Mines/Ashpit Ashpit II.
  • No new Secret Rooms are added in Greed Mode or Chapter 1 (if it's a starting item for Eden Eden), but the beam of light is still added to current Secret Rooms.
  • No new Secret Rooms are added in Home Home.
  • If kept after using Birthright Birthright with Tainted Eden Tainted Eden, upon taking damage, the additional tear rate is lost. More beams of light will have to be found or used for the tears to be regained (assuming not all of them were used).
  • The level generation does not guarantee an additional Super Secret Room can be placed; there is limited space for special rooms, and other types may take priority over it.
    • Normal Secret Rooms are exempt from this limitation, and the extra one should always be available.
  • Luna may make Planetarium Planetariums harder to encounter, as the extra Super Secret Room has priority over Planetariums in level generation.
  • If playing Co-op or as Jacob and Esau Jacob and Esau, characters that did not pick up Luna will still gain full benefit from stepping within the beam of light. However, this will only benefit one character.
  • Multiple copies of Luna will not cause additional Secret Rooms or Super Secret Rooms to be generated.


  • Fragmented Card Fragmented Card: The effects stack, spawning three Secret Rooms on the floor. All three Secret Rooms will contain beams of light.

In-game footage[]



  • Luna is the Latin word for moon, and is currently used in some Latin-based languages with the same meaning.
  • In Antibirth, Luna's effect only included providing the player extra Secret and Super Secret rooms.


PC C8T7 1RY0 (Floor XL Planetarium at spawn)

PC J478 XG3W (Basement Basement II Planetarium)