Mushroom Boi!

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The Mushroom Boi! is a power skill exclusive to the Bad Seed DLC. It spawns a friendly Jerkshroom which attacks nearby enemies.


  • Special Effects:
    • Spawns a friendly Jerkshroom that follows the player around.
      • If an enemy is nearby, it will charge at them, dealing a base 50 damage on impact.
        • If the enemy hits a wall after being hit, an additional base 100 damage is inflicted.
      • Attempting to summon the Jerkshroom again while it is still active will instead make it explode, dealing 300 base damage to any nearby enemy. The skill then goes on cool-down.
  • Tags: Pet, PetBuff, TransformOnUse
  • Legendary Version:
    • Forced Affix: Poison Cloud on Hit
      • "Victims release a toxic cloud with each hit."

The Sacrifice[edit]

The Mushroom Boi is part of a sacrificial ritual that grants the player the Sacrificial Tick Outfit. To initiate this ritual, the player must go to the Morass of the Banished. In it, the player must reach the end of the biome, where a masked individual known as the Swamp Priest resides. The Swamp Priest stands next to an altar that depicts Mama Tick, he nags the player to offer a sacrifice, namely the Mushroom Boi. If the player complies, the Mushroom Boi is completely removed from the player's inventory and the subsequent fight that should take place in the Nest will not occur. This ritual can be repeated in subsequent visits with the same result, but the outfit can only be obtained the first time unless the player did not hand it over to the Collector.

If the player has a ranged weapon in their inventory and manages to attack Mama Tick in the brief moments she raises her eye above the water, the fight begins as usual and the outfit blueprint will not be dropped.


  • The Mushroom Boi will not attack nearby enemies if the player is invisible.
  • To obtain its relevant achievements:
    • Bound for Hell - Detonate the Mushroom Boi by using the skill again while Mushroom Boi is active.
    • Who's a good boi? - Beat the final boss while the Mushroom Boi is active, and do not detonate mushroom boi.
    • Pact with the Devil - Sacrifice the Mushroom Boi to Mama Tick, as mentioned in the previous section.
  • Although it's a pet skill scaled by Health Stat.pngSurvival, players scaled by Skill Stat.pngTactic can also be helped from it because it has strong knockback, making the player safer to use ranged attacks.


  • The Mushroom Boi! is the second pet skill to be added to the game, with the first being the Great Owl of War Icon.png Great Owl of War.
  • It is so far the only item in the entire game that contains non-alphabetical characters in its name.
  • Mushroom Boi! is the only item required to obtain a blueprint of an outfit.
  • There is a visual glitch that occurs when you teleport anywhere and have activated Mushroom Boi! that makes him appear to be crouching, similar to the Jerkshroom Hide defensive ability.


  • 1.7: Introduced.
  • 1.8: Now breaks the players invisibility when attacking.
    • No longer attacks when the player is invisible.
    • Removed tag "UnlockInPublicEvent".
    • Added tag "Pet", "PetBuff" and "TransformOnUse".
  • 1.9: Rally effect has been removed.
    • No longer activates cooldown reduction mutations.
  • 2.9: Unlock cost increased from 50 cells to 80.
  • 3.0: Added the Legendary Affix "Poison Cloud on Hit".
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