Binding of Isaac: Rebirth Wiki

We Need to Go Deeper! is an activated item.


  • Spawns a trapdoor that leads to the next floor upon activation.
    • Removed in Repentance There is a 10% chance the trapdoor will instead lead into a Crawl Space Crawl Space.
    • Added in Repentance Some tiles will appear with a special graphic (for example grass or a piece of garbage in Basement Basement). Using this item on these tiles will guarantee a Crawl Space Crawl Space. Only one trapdoor to the Crawl Space can be made per floor, as all subsequent uses will guarantee a trapdoor to the next floor.
    • If used in Womb Womb II/Utero Utero II/Scarred Womb Scarred Womb II, the trapdoor will always lead to Sheol Sheol.


  • If more than one Crawl Space Crawl Space trapdoor exists, they will all lead to the same Crawl Space Crawl Space.
  • Removed in Repentance Has no effect in the Cathedral Cathedral, Chest Chest, Sheol Sheol, Dark Room Dark Room, Added in Afterbirth??? ??? and Added in Afterbirth †The Void The Void (no trapdoors of any type will be generated).
    • Added in Repentance Can only create crawl space trapdoors in the aforementioned stages and in Corpse Corpse II, Home Home and during the Ascent.
  • A trapdoor cannot be placed in front of a Secret Room Secret Room entrance position, making this item an indirect aid to locating Secret Rooms.
  • This item can be used to destroy rocks if used while Isaac is flying over a rock.
  • This item can be used to create a trapdoor to Sheol Sheol on Womb Womb, even before Sheol has been unlocked.
  • When used on the last floor of a challenge, a trapdoor to the next floor can spawn. If it is entered, Isaac must beat the boss of that floor to spawn the ending trophy.
    • Added in Repentance While trapdoors will no longer spawn on challenges on floors at the final destination, certain challenges like Red Redemption may still spawn a trapdoor leading to the next floor.
  • Added in Afterbirth † The item may be used on the dirt patches in the Dark Room Dark Room to dig up a random type of chest.


  • Added in RepentanceBook of Virtues Book of Virtues: Spawns a skull wisp on the middle ring that shoots bone tears.
  • Added in AfterbirthCar Battery Car Battery: In most cases, no extra effect. When used near the entrances to a room, the item can occasionally open 2 trapdoors at once, Removed in Repentance increasing the chance of opening a crawl space.

In-game footage[]


  • The name of this item is a reference to the movie Inception.



Bug Bug! Removed in Afterbirth † If a trapdoor is spawned inside of a Black Market Black Market with this item and is entered, the player is trapped in the Crawl Space Crawl Space unless they go to the next floor.