Old School RuneScape Wiki

Mutated zygomite icon.png

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.png

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.png Mort myre fungus 1–2 Always 527–1,054


Item Quantity Rarity GE market price
Rune axe.png Rune axe 1 Uncommon (~1/40) 7,181


Item Quantity Rarity GE market price
Earth rune.png Earth rune 100 Common (~1/8) 400
Law rune.png Law rune 15 Common (~1/20) 2,490
Cosmic rune.png Cosmic rune 15 Common (~1/20) 2,145
Nature rune.png Nature rune 15 Common (~1/20) 3,255


Item Quantity Rarity GE market price
Mushroom spore.png Mushroom spore 1 Common (~1/10) 67
Teak seed.png Teak seed 1 Rare 85
Maple seed.png Maple seed 1 Rare 28,320
Willow seed.png Willow seed 1 Rare 3,620
Palm tree seed.png Palm tree seed 1 Rare 39,781
Mahogany seed.png Mahogany seed 1 Rare 3,029
Yew seed.png Yew seed 1 Rare 68,162
Ranarr seed.png Ranarr seed 1 Rare 45,466
Snapdragon seed.png Snapdragon seed 1 Rare 54,551
Magic seed.png Magic seed 1 Very rare 118,931
Spirit seed.png Spirit seed 1 Very rare Not sold


Item Quantity Rarity GE market price
Grimy kwuarm.png Grimy kwuarm 1–2 (noted) Common (~1/20) 1,165–2,330
Grimy torstol.png Grimy torstol 1 Common (~1/20) 8,341
Grimy cadantine.png Grimy cadantine 1–2 (noted) Uncommon (~1/30) 1,312–2,624
Grimy dwarf weed.png Grimy dwarf weed 1–2 (noted) Uncommon (~1/30) 448–896
Grimy lantadyme.png Grimy lantadyme 1 (noted) Uncommon (~1/40) 1,391


Item Quantity Rarity GE market price
Numulite.png Numulite 7–19 Common (9/25; 36%) 140–380
Unidentified small fossil.png Unidentified small fossil 1 Uncommon (1/50) Not sold
Unidentified medium fossil.png Unidentified medium fossil 1 Rare (1/100) Not sold
Unidentified large fossil.png Unidentified large fossil 1 Rare (1/125) Not sold
Unidentified rare fossil.png Unidentified rare fossil 1 Rare (1/500) Not sold


Item Quantity Rarity GE market price
Pyrophosphite.png Pyrophosphite 1 Common (~1/6)[2] 71
Calcite.png Calcite 1 Common (~1/6)[2] 20
Supercompost.png Supercompost 2 (noted) Common (~1/10) 912
Gem drop table.png Gem drop table 1 Common (~1/20) Not sold
Mort myre fungus.png Mort myre fungus 5 (noted) Uncommon 2,635
Volcanic ash.png Volcanic ash 2 Uncommon (~1/48) 136
Clue scroll (medium).png 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.png Uncut sapphire 1 Uncommon 455
Uncut emerald.png Uncut emerald 1 Rare 679
Uncut ruby.png Uncut ruby 1 Rare 1,249
Rare drop table talisman.png Unknown talisman
(please specify)
1 Rare Error
Uncut diamond.png Uncut diamond 1 Very rare 2,627
Rune javelin.png Rune javelin 5 Very rare 875
Loop half of key.png Loop half of key 1 Very rare 10,307
Tooth half of key.png Tooth half of key 1 Very rare 10,840
Rune spear.png Rune spear 1 Very rare 11,933
Shield left half.png Shield left half 1 Very rare 65,697
Dragon spear.png Dragon spear 1 Very rare 37,226