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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.

Location

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 there

  • Using the charter ship.
  • Using the Big Book o' Piracy option 1, a reward from the quest Pieces of Hate.
  • 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).

Drops

100% drop

Item Quantity Rarity GE price
Big bonesBig bones1Always153

Charms

No charmGold charmGreen charmCrimson charmBlue charm
79–81%4–5%1–2%13–15%0.2–0.5%
Represents a 90% confidence range based on a sample of 5,230 kills.
1 charm is dropped at a time.
Add data to the log (requires JavaScript).

Main drop

Item Quantity Rarity GE price
Coins 10000Coins2,351–12,488Common2,351–12,488
Teak logsTeak logs7–13 (noted)Common616–1,144
Mahogany logsMahogany logs3–7 (noted)Uncommon1,050–2,450
Monkey bonesMonkey bones(noted)Common504
Raw swordfishRaw swordfish4–12 (noted)Common860–2,580
Big bonesBig bones22–28 (noted)Common3,366–4,284
Weapon poison+ (3)Weapon poison+ (3)1Common1,224
Grimy ranarrGrimy ranarr(noted)Uncommon3,651
Grimy dwarf weedGrimy dwarf weed(noted)Rare7,602
Grimy lantadymeGrimy lantadyme(noted)Rare8,850
Poison ivy berriesPoison ivy berries(noted)Uncommon3,306
Ruby ringRuby ring4–6 (noted)Uncommon8,584–12,876
Ruby necklaceRuby necklace3–5 (noted)Uncommon6,852–11,420
CoconutCoconut(noted)Uncommon4,708
Rare drop tableRare drop table1RareNot sold
Black mask (10)Black mask (10)1Very rare1,362,070

Tertiary drops

Item Quantity Rarity GE price
Scare TacticsScare Tactics1Rare619,380
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 table

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 sapphire1Common348
Uncut emeraldUncut emerald1Common712
Uncut rubyUncut ruby1Common1,165
Uncut diamondUncut diamond1Common2,529
Uncut diamondUncut diamond45–55 (noted)Rare113,805–139,095
Loop half of a keyLoop half of a key1Common10,558
Tooth half of a keyTooth half of a key1Common14,209
Uncut dragonstoneUncut dragonstone1Uncommon12,064
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare542,880–663,520
Dragon longswordDragon longsword1Common58,255
Dragon spearDragon spear1Rare36,639
BattlestaffBattlestaff180–220 (noted)Rare764,100–933,900
Rune javelinRune javelin5Rare905
Rune platebodyRune platebody1Uncommon37,480
Rune platebodyRune platebody15–25 (noted)Rare562,200–937,000
Shield left halfShield left half1Rare64,888
Dragon helmDragon helm1Uncommon59,043
Rune arrowheads 5Rune arrowheads113–137Common15,481–18,769
Onyx bolts 5Onyx bolts135–165Very rare1,069,740–1,307,460
Chaos talismanChaos talisman1Rare1,218
Nature talismanNature talisman1Rare790
Water talismanWater talisman65–82 (noted)Rare243,750–307,500
Earth talismanEarth talisman65–82 (noted)Rare15,470–19,516
Fire talismanFire talisman25–35 (noted)Rare7,750–10,850
Raw lobsterRaw lobster135–165 (noted)Common26,055–31,845
Raw sharkRaw shark225–275 (noted)Uncommon177,750–217,250
Big bonesBig bones68–82 (noted)Uncommon10,404–12,546
Dragon bonesDragon bones180–220 (noted)Rare345,780–422,620
CoalCoal200–1,100 (noted)Uncommon21,600–118,800
Gold oreGold ore90–110 (noted)Common29,430–35,970
Adamantite oreAdamantite ore180–220 (noted)Uncommon40,680–49,720
Adamant barAdamant bar14–16 (noted)Common23,548–26,912
Adamant barAdamant bar135–165 (noted)Rare227,070–277,530
Runite oreRunite ore90–110 (noted)Rare105,930–129,470
Rune barRune bar(noted)Common7,911
Rune barRune bar45–55 (noted)Rare118,665–145,035
Grimy torstolGrimy torstol90–110 (noted)Uncommon377,730–461,670
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon116,190–142,010
Super restore (4)Super restore (4)45–55 (noted)Uncommon166,005–202,895
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon122,175–149,325
Lantadyme seed 5Lantadyme seed14–16Uncommon4,774–5,456
Dwarf weed seed 5Dwarf weed seed14–16Uncommon4,144–4,736
Magic seed 5Magic seed4Uncommon103,172
Palm tree seed 5Palm tree seed10Rare221,520
FlaxFlax450–550 (noted)Common38,700–47,300
Molten glassMolten glass45–55 (noted)Common10,305–12,595
Soft claySoft clay450–550 (noted)Uncommon277,200–338,800
Yew logsYew logs68–82 (noted)Uncommon11,016–13,284
Yew logsYew logs675–825 (noted)Rare109,350–133,650
Teak plankTeak plank45–55 (noted)Uncommon12,420–15,180
Mahogany plankMahogany plank270–330 (noted)Rare209,250–255,750
Blurberry SpecialBlurberry Special1Uncommon8,667
Vecna skullVecna skull1Very rare*159,163
Hazelmere's signet ringHazelmere's signet ring1Very rare*1,671,277,144
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 drops

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 rare9,242
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