Magic Mushroom 
Effect
- Grants Isaac one Red Heart Container.
- +0.3 Damage.
- x1.5 damage multiplier.
- (Removed in Repentance) +5.25 / (Added in Repentance) +1.5 Range.
- +0.3 Speed.
- +0.5 Tear Height.
- Restores all Health.
- Isaac grows in size.
- (Added in Afterbirth) This item belongs to the Fun Guy set. Collecting three items from this set will transform Isaac into a walking mushroom.
- (Added in Afterbirth †) This item belongs to the Stompy set. Collecting three items from this set will transform Isaac into Stompy.
Interactions
Blood of the Martyr + 
The Book of Belial / 
Cricket's Head / Magic Mushroom: Damage multipliers do not stack. Only the highest one is counted.