Binding of Isaac: Rebirth Wiki
(I'm going to say datamined algorithm from code trumps anecdotal experience)
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(Added Book of Virtues.)
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Upon use, it:
 
Upon use, it:
   
*Reveals the [[Chapters|floor]] layout and all special rooms except the [[Super Secret Room]].
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* Reveals the [[Chapters|floor]] layout and all special rooms except the [[Super Secret Room]].
*Drops either a [[Soul Heart]] or a random [[Cards and Runes|card or rune]]. (50% chance of either)
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* Drops either a [[Soul Heart]] or a random [[Cards and Runes|card or rune]]. (50% chance of either)
*{{dlc|r}} While held, increases the chance of finding a [[Planetarium]] by 15%, or 100% if a treasure room has been skipped.
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* {{dlc|r}} While held, increases the chance of finding a [[Planetarium]] by 15%, or 100% if a treasure room has been skipped.
   
 
==Notes ==
 
==Notes ==
 
* The map revealing effect will not work if the [[Curse of the Lost]] is active.
 
 
* It's possible to get more than one Crystal Ball from [[Machines|Fortune Tellers]] on a single run.
*The map revealing effect will not work if the [[Curse of the Lost]] is active.
 
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* {{dlc|r}} The Planetarium bonus guarantees the level generation to ''attempt'' placing one, but the level layout may not have enough room. Read the article on [[Planetarium]]s for further details.
*It's possible to get more than one Crystal Ball from [[Machines|Fortune Tellers]] on a single run.
 
   
 
==Interactions==
 
==Interactions==
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* {{I|Book of Virtues}}: Spawns wisps in the middle ring, looking like the crystal ball. Wisps have higher health and 1.2 shot speed.
   
 
*{{t|Daemon's Tail}}: The chance to drop cards or runes will change to 90%/10% in favor of cards.
 
*{{t|Daemon's Tail}}: The chance to drop cards or runes will change to 90%/10% in favor of cards.

Revision as of 07:28, 9 August 2021

The Crystal Ball is an activated item.

Effects

Upon use, it:

Notes

  • The map revealing effect will not work if the Curse of the Lost is active.
  • It's possible to get more than one Crystal Ball from Fortune Tellers on a single run.
  • (in Repentance) The Planetarium bonus guarantees the level generation to attempt placing one, but the level layout may not have enough room. Read the article on Planetariums for further details.

Interactions

  • (in Repentance)Collectible Book of Virtues iconBook of Virtues: Spawns wisps in the middle ring, looking like the crystal ball. Wisps have higher health and 1.2 shot speed.
  • Daemon's TailDaemon's Tail: The chance to drop cards or runes will change to 90%/10% in favor of cards.

Trivia

  • The reflection of a face can be seen on the crystal ball's surface. It is easier to make out on the 3DS lower screen icon.

In-game Footage

Unlockable Achievements

Gallery

Seeds

PC QDEJ YC0G (Treasure Room adjacent to spawn)

PC (except in Rebirth) SDEY E6TL (First floor Treasure Room)

PS4 S9JE DPPD (Treasure Room adjacent to spawn)