Mutated zygomite icon

Ancient Zygomites are stronger variants of mutated zygomites that require level 57 Slayer to harm. They are found exclusively on Fossil Island in the Mushroom Forest. Ancient zygomites cannot be killed unless a fungicide spray has been used to deliver the final blow. They first appear as non-attackable Ancient Fungi, which players must pick in order to provoke them out of the ground. Players who have been given a mutated zygomite Slayer assignment can choose to kill them as an alternative for the task.

Strengths and weaknesses

Ancient Fungi

Ancient Zygomites use both magic-based melee attacks and magic-based ranged. Armour with a low magic defence bonus such as rune will typically have a higher chance of being hit, therefore dragonhide armour is strongly recommended while fighting them, as its higher magic defence will reduce the chance of being damaged. If praying against their attacks, Protect from Missiles is recommended, as their ranged attacks are stronger and more accurate than their melee attacks.


Estimated drop rates are based off 1,000 kills.[1]


Item Quantity Rarity GE market price
Mort myre fungus Mort myre fungus 1–2 Always 575–1,150


Item Quantity Rarity GE market price
Rune axe Rune axe 1 Uncommon (~1/40) 7,257


Item Quantity Rarity GE market price
Earth rune Earth rune 100 Common (~1/8) 500
Law rune Law rune 15 Common (~1/20) 2,760
Cosmic rune Cosmic rune 15 Common (~1/20) 2,190
Nature rune Nature rune 15 Common (~1/20) 3,195


Item Quantity Rarity GE market price
Mushroom spore 5 Mushroom spore 1 Common (~1/10) 52
Teak seed 5 Teak seed 1 Rare 80
Maple seed 5 Maple seed 1 Rare 29,411
Willow seed 5 Willow seed 1 Rare 3,882
Palm tree seed 5 Palm tree seed 1 Rare 53,252
Mahogany seed 5 Mahogany seed 1 Rare 3,350
Yew seed 5 Yew seed 1 Rare 71,067
Herb seed 5 Ranarr seed 1 Rare 49,706
Herb seed 5 Snapdragon seed 1 Rare 62,345
Magic seed 5 Magic seed 1 Very rare 155,855
Spirit seed 5 Spirit seed 1 Very rare Not sold


Item Quantity Rarity GE market price
Grimy kwuarm Grimy kwuarm 1–2 (noted) Common (~1/20) 1,199–2,398
Grimy torstol Grimy torstol 1 Common (~1/20) 7,405
Grimy cadantine Grimy cadantine 1–2 (noted) Uncommon (~1/30) 1,521–3,042
Grimy dwarf weed Grimy dwarf weed 1–2 (noted) Uncommon (~1/30) 538–1,076
Grimy lantadyme Grimy lantadyme 1 (noted) Uncommon (~1/40) 1,581


Item Quantity Rarity GE market price
Numulite 25 Numulite 7–19 Common (9/25; 36%) 119–323
Unidentified small fossil Unidentified small fossil 1 Uncommon (1/50) Not sold
Unidentified medium fossil Unidentified medium fossil 1 Rare (1/100) Not sold
Unidentified large fossil Unidentified large fossil 1 Rare (1/125) Not sold
Unidentified rare fossil Unidentified rare fossil 1 Rare (1/500) Not sold


Item Quantity Rarity GE market price
Pyrophosphite Pyrophosphite 1 Common (~1/6)[2] 76
Calcite Calcite 1 Common (~1/6)[2] 27
Supercompost Supercompost 2 (noted) Common (~1/10) 622
Gem drop table Gem drop table 1 Common (~1/20) Not sold
Mort myre fungus Mort myre fungus 5 (noted) Uncommon 2,875
Volcanic ash Volcanic ash 2 Uncommon (~1/48) 118
Clue scroll (medium) Clue scroll (medium) 1 Rare (~1/128) Not sold
  1. 1000 kill drop log
  2. 2.0 2.1 Pyrophosphite and Calcite are dropped together.

Gem drop table

In addition to the drops above, this monster has access to the gem drop table.
Show/hide gem drop table
Item Quantity Rarity GE market price
Uncut sapphire Uncut sapphire 1 Uncommon 527
Uncut emerald Uncut emerald 1 Rare 708
Uncut ruby Uncut ruby 1 Rare 1,389
Rare drop table talisman Unknown talisman
(please specify)
1 Rare Error
Uncut diamond Uncut diamond 1 Very rare 2,838
Rune javelin Rune javelin 5 Very rare 835
Loop half of key Loop half of key 1 Very rare 10,547
Tooth half of key Tooth half of key 1 Very rare 10,065
Rune spear Rune spear 1 Very rare 11,949
Shield left half Shield left half 1 Very rare 65,421
Dragon spear Dragon spear 1 Very rare 38,134

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