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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 bones1Always244

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)Common966–1,794
Mahogany logsMahogany logs3–7 (noted)Uncommon1,470–3,430
Monkey bonesMonkey bones(noted)Common672
Raw swordfishRaw swordfish4–12 (noted)Common1,044–3,132
Big bonesBig bones22–28 (noted)Common5,368–6,832
Weapon poison+ (3)Weapon poison+ (3)1Common1,581
Grimy ranarrGrimy ranarr(noted)Uncommon5,808
Grimy dwarf weedGrimy dwarf weed(noted)Rare4,256
Grimy lantadymeGrimy lantadyme(noted)Rare5,244
Poison ivy berriesPoison ivy berries(noted)Uncommon3,866
Ruby ringRuby ring4–6 (noted)Uncommon4,936–7,404
Ruby necklaceRuby necklace3–5 (noted)Uncommon3,867–6,445
CoconutCoconut(noted)Uncommon9,340
Rare drop tableRare drop table1RareNot sold
Black mask (10)Black mask (10)1Very rare1,096,378

Tertiary drops

Item Quantity Rarity GE price
Scare TacticsScare Tactics1Rare986,202
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 sapphire1Common683
Uncut emeraldUncut emerald1Common1,575
Uncut rubyUncut ruby1Common1,181
Uncut diamondUncut diamond1Common2,147
Uncut diamondUncut diamond45–55 (noted)Rare96,615–118,085
Loop half of a keyLoop half of a key1Common17,695
Tooth half of a keyTooth half of a key1Common19,243
Uncut dragonstoneUncut dragonstone1Uncommon10,932
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare491,940–601,260
Dragon longswordDragon longsword1Common58,024
Dragon spearDragon spear1Rare36,204
BattlestaffBattlestaff180–220 (noted)Rare1,094,760–1,338,040
Rune javelinRune javelin5Rare910
Rune platebodyRune platebody1Uncommon37,905
Rune platebodyRune platebody15–25 (noted)Rare568,575–947,625
Shield left halfShield left half1Rare64,688
Dragon helmDragon helm1Uncommon58,863
Rune arrowheads 5Rune arrowheads113–137Common22,035–26,715
Onyx bolts 5Onyx bolts135–165Very rare1,070,010–1,307,790
Chaos talismanChaos talisman1Rare1,526
Nature talismanNature talisman1Rare1,437
Water talismanWater talisman65–82 (noted)Rare473,915–597,862
Earth talismanEarth talisman65–82 (noted)Rare151,385–190,978
Fire talismanFire talisman25–35 (noted)Rare45,550–63,770
Raw lobsterRaw lobster135–165 (noted)Common20,925–25,575
Raw sharkRaw shark225–275 (noted)Uncommon231,300–282,700
Big bonesBig bones68–82 (noted)Uncommon16,592–20,008
Dragon bonesDragon bones180–220 (noted)Rare312,300–381,700
CoalCoal200–1,100 (noted)Uncommon26,800–147,400
Gold oreGold ore90–110 (noted)Common14,850–18,150
Adamantite oreAdamantite ore180–220 (noted)Uncommon261,720–319,880
Adamant barAdamant bar14–16 (noted)Common37,604–42,976
Adamant barAdamant bar135–165 (noted)Rare362,610–443,190
Runite oreRunite ore90–110 (noted)Rare1,052,640–1,286,560
Rune barRune bar(noted)Common40,881
Rune barRune bar45–55 (noted)Rare613,215–749,485
Grimy torstolGrimy torstol90–110 (noted)Uncommon286,200–349,800
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon88,650–108,350
Super restore (4)Super restore (4)45–55 (noted)Uncommon130,230–159,170
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon140,940–172,260
Lantadyme seed 5Lantadyme seed14–16Uncommon5,306–6,064
Dwarf weed seed 5Dwarf weed seed14–16Uncommon9,254–10,576
Magic seed 5Magic seed4Uncommon394,820
Palm tree seed 5Palm tree seed10Rare859,470
FlaxFlax450–550 (noted)Common18,900–23,100
Molten glassMolten glass45–55 (noted)Common8,820–10,780
Soft claySoft clay450–550 (noted)Uncommon216,000–264,000
Yew logsYew logs68–82 (noted)Uncommon10,336–12,464
Yew logsYew logs675–825 (noted)Rare102,600–125,400
Teak plankTeak plank45–55 (noted)Uncommon33,660–41,140
Mahogany plankMahogany plank270–330 (noted)Rare287,550–351,450
Blurberry SpecialBlurberry Special1Uncommon7,734
Vecna skullVecna skull1Very rare*241,411
Hazelmere's signet ringHazelmere's signet ring1Very rare*2,052,582,424
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 rare10,059