Magic Mushroom

Treasure Room Boss Treasure Room Mushroom   (page 1, column 12, line 1) (page 1, column 2, line 2)

Magic Mushroom is a passive item.

Effect

• Grants one red heart container.
• +0.3 Damage Up.
• x1.5 Damage Multiplier.
• +5.25 Range Up.
• +0.3 Speed Up.
• +0.5 Tear Height.
• Isaac grows in size.
• Fully restores all red heart containers.
• This item belongs to the Fun Guy

  +1 heart container.

  set. Collecting three items from this set will transform Isaac into a walking mushroom.
• This item belongs to the Stompy

  Taking damage has a chance to spawn rock waves.

  set. Collecting three items from this set will transform Isaac into Stompy.

Notes

• The Magic Mushroom does not give a tears up or luck up despite its quote saying 'All Stats Up!'.
• The x1.5 damage multiplier does not stack with the x1.5 damage multiplier from Cricket's HeadIncreases damage by 0.5, and multiplies it by 1.5x., from the combination of The Book of BelialUpon use increases damage by 2 for the current room and by a further +50% if the character also has the Blood of the Martyr.
  Guarantees a Devil Room or Angel Room will be open after beating a boss while holding it, or increases the chance by 12.5%. and Blood of the MartyrIncreases Damage by 1, and turns Isaac's tears into blood tears., or itself (by using an item such as DiplopiaDuplicates all pickups and item pedestals in the room., for example). However, it will stack with any multipliers not listed here.

Unlockable achievements

• 

  Huge Growth - Increase in size 5 times in a single run. Sources of increased size include "One Makes you Larger" pills, XI - Strength, and Magic Mushroom.

Trivia

• This item and its size change effect is a reference to the mushroom species amanita muscaria (fly agaric), which causes visual and auditory hallucinations, including perceived changes in size.
• 'Magic mushrooms' is a colloquial term for psilocybin mushrooms, although amanita muscaria itself contains no psilocybin or psilocin.
• This item and its effects are also a reference to the Super Mushroom from the Super Mario series of video games.
• This item is the only item in the game that works towards 2 transformations (Stompy and Fun Guy).

Seeds

 PC  WMZW QH3C (Treasure room adjacent to spawn)

 PC  TMVB HCXL (Treasure room adjacent to spawn)

 PC  PJJ2 MS7A (Treasure room adjacent to spawn)

 PS4  M24C 0ZF9 (First floor treasure room)

 3DS  GA1R NMS1 (First floor treasure room; Curse of the Lost)

 Switch  YFYC 81TR (First Silver Treasure Room)

 Switch  EK6A 6V9Y (Tresure room adjacent to spawn)