The Crystal Ball is an activated item.
Contents
Effects[]
Upon use, it:
- Reveals the floor layout and all special rooms except the Super Secret Room.
- Drops either a Soul Heart or a random card or rune. (50% chance of either)
While held, increases the chance of finding a Planetarium by 15%, or 100% if a treasure room has been skipped.
While held, increases the chance of finding a 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.
- 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[]
- Book of Virtues: Spawns wisps in the middle ring, looking like the crystal ball. Wisps have higher health and 1.2 shot speed.
- Daemon'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[]
3DS The icon of Crystal Ball as seen on the lower 3DS screen.
Seeds[]
PC QDEJ YC0G (Treasure Room adjacent to spawn)
PC 
SDEY E6TL (First floor Treasure Room)
PS4 S9JE DPPD (Treasure Room adjacent to spawn)
 The Binding of Isaac: Rebirth
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 Achievements
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 Attributes
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 Bosses
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 Cards and Runes
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 Challenges
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 Chapters
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 Characters
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 Co-op
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 Items
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 Item pools
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 Monsters
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 Objects
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 Pickups
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 Pills
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 Rooms
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 Seeds
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 Transformations
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 Trinkets
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