Advent of Ascension Wiki

Take the poll asking your favorite/least favorite dimensions, and about the fate of Celeve/Creeponia, here.


Advent of Ascension Wiki
King Shroomus
King Shroomus.png
Health 1800 (♥×900)
Size Width: 0.875 blocks
Height: 3.25 blocks
Damage 20 (♥×10)
Environment Mysterium
Hostility Hostile
XP Xp Orb.png 189
ID aoa3:king_shroomus
Version added 1.1

King Shroomus (AKA The Mushroom Monster) is the only boss in Mysterium. He is spawned by dropping a Shroom Stone in Mysterium and waiting for a few seconds.


King Shroomus is a ranged boss that will fire projectiles at the player at a moderate pace. Upon hit, the player is inflicted with one of four debuffs:

  • Slowness III for 4 seconds
  • Poison V for 4 seconds
  • Nausea CI (Nausea 101) for 7 seconds
  • Weakness III for 5 seconds

King Shroomus has a 1 in 200 chance per world tick to regenerate a portion of his health. He regenerates at a rate of 2 (♥×1) health per world tick for 4 seconds.


Entity loot
Item Quantity Chance
Nothing - 67.6%
Shroomus Sword.png Shroomus Sword 1 18.9%
Fungal Staff.png Fungal Staff 1 13.5%
The above pool is rolled 1 time
Nothing - 12.8%
Magic Repair Dust.png Magic Repair Dust 1-3 7.7%
Silver Coin.png Silver Coin 1-5 8.9%
Gold Coin.png Gold Coin 1-2 3.8%
Enchanted Gunpowder.png Enchanted Gunpowder 1 5.1%
Poison Rune.png Poison Rune 6-20 10.2%
Life Rune.png Life Rune 6-20 10.2%
Water Rune.png Water Rune 6-20 10.2%
Mystic Shrooms.png Mystic Shrooms 1-4 7.1%
Red Mushroom.png Red Mushroom 8-32 8.2%
Brown Mushroom.png Brown Mushroom 8-32 8.2%
Mushroom Stem.png Mushroom Stem 1-6 7.7%
The above pool is rolled 1-2 times
Trophy.png King Shroomus Trophy 1 100.0%
The above pool is rolled 1 time
Mysterium Table 1 100.0%
The above pool is rolled 1 time

Related Advancements[]

Icon Name Description Obtaining Parent ID Hidden
Advancement challenge bg.pngTrophy.png Shroomed! Defeat King Shroomus, the mushroom monster See description It's Not What It Looks Like! aoa3:mysterium/shroomed No