For the elite version, see Unspeakable horror (elite).
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Unspeakable horror icon
An Unspeakable horror is a Slayer monster found in the north-eastern part of the Mos Le'Harmless Caves. The player requires level 58 Slayer, a witchwood icon, and a light source to successfully hunt and kill them. Completion of the Cabin Fever quest is required to access Mos Le'Harmless. Despite having the same Slayer level requirement, they are much stronger than the Cave horrors found in the rest of the cave.

Players can buy a witchwood icon from any Slayer Master and must wear it while fighting horrors in close combat. The player can damage them without the icon, but the icon protects against the horrors' scream. Without the icon, the scream reduces stats and life points, similar to the effect of a Banshee when fought without earmuffs or a Dust devil when fought without a Face mask. The Deflect Melee and Protect from Melee prayers will not block this damage.

These monsters are aggressive, regardless of Combat level. They become docile after 5-10 minutes of staying in the vicinity of the monsters, which can be reset by running out of the area, then returning.


Mos Le'Harmless Caves - in a cave on the southeast side of the island. Players need a light source (such as Seer's headband 4 or a bullseye lantern) to operate in the cave. If a player goes in without a light source, bugs will rapidly bite them hitting 10-100 and can kill the player quickly depending on their number of life points.

Getting thereEdit

  • Using the charter ship.
  • Teleporting using rum (red) or rum (blue) bought from Honest Jimmy's House of Stuff
  • Accessing through the Fairy ring DIP (requires Fairy Tale III). If using the fairy ring shortcut, the player must first repair the bridges connecting the fairy ring island to the Mos le'Harmless mainland. This will require a total of 8 regular planks and 16 nails of any kind. Each bridge must be repaired from a different side, meaning the player must fix it from the Mos Le'Harmless side as well as the fairy ring island side if it is the first time using the shortcut).


100% dropEdit

Item Quantity Rarity GE price
Big bonesBig bones1Always202


No charmGold charmGreen charmCrimson charmBlue charm
Represents a 90% confidence range based on a sample of 5,069 kills.
1 charm is dropped at a time.
Add data to the log (requires JavaScript).

Main dropEdit

Item Quantity Rarity GE price
Coins 10000Coins2,351–12,456Common2,351–12,456
Teak logsTeak logs7–13 (noted)Common1,365–2,535
Mahogany logsMahogany logs3–7 (noted)Uncommon2,412–5,628
Monkey bonesMonkey bones(noted)Common2,376
Raw swordfishRaw swordfish4–12 (noted)Common1,912–5,736
Big bonesBig bones22–28 (noted)Common4,444–5,656
Weapon poison+ (3)Weapon poison+ (3)1Common1,774
Grimy ranarrGrimy ranarr(noted)Uncommon6,861
Grimy dwarf weedGrimy dwarf weed(noted)Rare4,320
Grimy lantadymeGrimy lantadyme(noted)Rare5,666
Poison ivy berriesPoison ivy berries(noted)Uncommon4,008
Ruby ringRuby ring4–6 (noted)Uncommon7,076–10,614
Ruby necklaceRuby necklace3–5 (noted)Uncommon5,886–9,810
Rare drop tableRare drop table1RareNot sold
Black mask (10)Black mask (10)1Very rare770,683

Tertiary dropsEdit

Item Quantity Rarity GE price
Scare TacticsScare Tactics1Rare77,247
Festering journalFestering journal1UncommonNot sold
Sealed clue scroll (hard)Sealed clue scroll (hard)1RareNot sold
Spirit sapphireSpirit sapphire1RareNot sold
Spirit emeraldSpirit emerald1RareNot sold
Spirit rubySpirit ruby1RareNot sold
Long boneLong bone1RareNot sold
Starved ancient effigyStarved ancient effigy1Very rareNot sold
Curved boneCurved bone1Very rareNot sold

Rare drop tableEdit

This monster has access to the rare drop table.
Luck-enhancing items such as a ring of wealth or luck of the dwarves are not required to access the table.
Show/hide rare drop table
Item Quantity Rarity GE price
Coins 250Coins250–500Common250–500
Uncut sapphireUncut sapphire1Common885
Uncut emeraldUncut emerald1Common2,048
Uncut rubyUncut ruby1Common1,844
Uncut diamondUncut diamond1Common3,614
Uncut diamondUncut diamond45–55 (noted)Rare162,630–198,770
Loop half of a keyLoop half of a key1Common17,475
Tooth half of a keyTooth half of a key1Common21,105
Uncut dragonstoneUncut dragonstone1Uncommon11,722
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare527,490–644,710
Dragon longswordDragon longsword1Common57,672
Dragon spearDragon spear1Rare35,005
BattlestaffBattlestaff180–220 (noted)Rare1,092,960–1,335,840
Rune javelinRune javelin5Rare880
Rune platebodyRune platebody1Uncommon37,639
Rune platebodyRune platebody15–25 (noted)Rare564,585–940,975
Shield left halfShield left half1Rare65,160
Dragon helmDragon helm1Uncommon58,593
Rune arrowheads 5Rune arrowheads113–137Common26,781–32,469
Onyx bolts 5Onyx bolts135–165Very rare1,059,750–1,295,250
Chaos talismanChaos talisman1Rare1,461
Nature talismanNature talisman1Rare1,432
Water talismanWater talisman65–82 (noted)Rare410,800–518,240
Earth talismanEarth talisman65–82 (noted)Rare115,440–145,632
Fire talismanFire talisman25–35 (noted)Rare38,050–53,270
Raw lobsterRaw lobster135–165 (noted)Common29,970–36,630
Raw sharkRaw shark225–275 (noted)Uncommon266,850–326,150
Big bonesBig bones72–90 (noted)Uncommon14,544–18,180
Dragon bonesDragon bones180–220 (noted)Rare328,140–401,060
CoalCoal200–1,100 (noted)Uncommon27,800–152,900
Gold oreGold ore90–110 (noted)Common15,120–18,480
Adamantite oreAdamantite ore180–220 (noted)Uncommon214,560–262,240
Adamant barAdamant bar14–16 (noted)Common39,424–45,056
Adamant barAdamant bar135–165 (noted)Rare380,160–464,640
Runite oreRunite ore90–110 (noted)Rare1,082,880–1,323,520
Rune barRune bar(noted)Common42,060
Rune barRune bar45–55 (noted)Rare630,900–771,100
Grimy torstolGrimy torstol90–110 (noted)Uncommon340,740–416,460
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon182,970–223,630
Super restore (4)Super restore (4)45–55 (noted)Uncommon190,800–233,200
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon169,650–207,350
Lantadyme seed 5Lantadyme seed14–16Uncommon9,268–10,592
Dwarf weed seed 5Dwarf weed seed14–16Uncommon9,772–11,168
Magic seed 5Magic seed4Uncommon427,636
Palm tree seed 5Palm tree seed10Rare1,048,570
FlaxFlax450–550 (noted)Common16,650–20,350
Molten glassMolten glass45–55 (noted)Common13,770–16,830
Soft claySoft clay450–550 (noted)Uncommon213,300–260,700
Yew logsYew logs68–82 (noted)Uncommon13,192–15,908
Yew logsYew logs675–825 (noted)Rare130,950–160,050
Teak plankTeak plank45–55 (noted)Uncommon33,840–41,360
Mahogany plankMahogany plank270–330 (noted)Rare388,530–474,870
Blurberry specialBlurberry special1Uncommon2,492
Vecna skullVecna skull1Very rare*268,789
Hazelmere's signet ringHazelmere's signet ring1Very rare*1,885,212,297
Brawling gloves (Melee)Brawling gloves (Melee)1Very rareNot sold
Brawling gloves (Magic)Brawling gloves (Magic)1Very rareNot sold
Brawling gloves (Ranged)Brawling gloves (Ranged)1Very rareNot sold
Brawling gloves (Agility)Brawling gloves (Agility)1Very rareNot sold
Brawling gloves (Cooking)Brawling gloves (Cooking)1Very rareNot sold
Brawling gloves (FM)Brawling gloves (FM)1Very rareNot sold
Brawling gloves (Fishing)Brawling gloves (Fishing)1Very rareNot sold
Brawling gloves (Hunter)Brawling gloves (Hunter)1Very rareNot sold
Brawling gloves (Mining)Brawling gloves (Mining)1Very rareNot sold
Brawling gloves (Prayer)Brawling gloves (Prayer)1Very rareNot sold
Brawling gloves (Smithing)Brawling gloves (Smithing)1Very rareNot sold
Brawling gloves (Thieving)Brawling gloves (Thieving)1Very rareNot sold
Brawling gloves (WC)Brawling gloves (WC)1Very rareNot sold
Crystal triskelion fragment 1Crystal triskelion fragment 11Very rareNot sold
Crystal triskelion fragment 2Crystal triskelion fragment 21Very rareNot sold
Crystal triskelion fragment 3Crystal triskelion fragment 31Very rareNot sold

Universal dropsEdit

Universal drops are dropped by nearly every monster outside of Daemonheim.
These drops are dropped alongside main drops.
Item Quantity Rarity GE price
Key tokenKey token1RareNot sold
Mimic kill tokenMimic kill token1Very rare38,735