Crystal Key

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Crystal   Key
Trinket icon
"Call to the other side"
Table dividing line 1.png
Trinket ID
Table dividing line 3.png
Unlock Method
Crystal Key Defeat Mother as Tainted Lost Tainted Lost
Added in Repentance

Crystal Key is a trinket added in The Binding of Isaac: Repentance.

Effects[edit | edit source]

  • Whenever Isaac clears a room, has a chance to unlock a neighboring Red Room.
    • This effect can occur while Isaac is inside a Red Room.

Notes[edit | edit source]

The chance for a Red Room door to unlock depends on the number of Crystal Keys held and what room was cleared.

Crystal Key Count Normal Room Red room
1 33.3% 12.5%
2 50% 16.6%
3 100% 25%
4 100% 50%
5 100% 100%
  • Each cleared wave of a Challenge Room has a chance to generate an adjacent Red Room.

In-game footage[edit | edit source]

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