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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 bones1Always162

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)Common525–975
Mahogany logsMahogany logs3–7 (noted)Uncommon909–2,121
Monkey bonesMonkey bones(noted)Common476
Raw swordfishRaw swordfish4–12 (noted)Common1,568–4,704
Big bonesBig bones22–28 (noted)Common3,564–4,536
Weapon poison+ (3)Weapon poison+ (3)1Common1,496
Grimy ranarrGrimy ranarr(noted)Uncommon5,112
Grimy dwarf weedGrimy dwarf weed(noted)Rare24,696
Grimy lantadymeGrimy lantadyme(noted)Rare21,164
Poison ivy berriesPoison ivy berries(noted)Uncommon2,880
Ruby ringRuby ring4–6 (noted)Uncommon8,024–12,036
Ruby necklaceRuby necklace3–5 (noted)Uncommon6,189–10,315
CoconutCoconut(noted)Uncommon10,058
Rare drop tableRare drop table1RareNot sold
Black mask (10)Black mask (10)1Very rare1,478,470

Tertiary drops

Item Quantity Rarity GE price
Scare TacticsScare Tactics1Rare512,004
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 sapphire1Common334
Uncut emeraldUncut emerald1Common670
Uncut rubyUncut ruby1Common1,087
Uncut diamondUncut diamond1Common2,398
Uncut diamondUncut diamond45–55 (noted)Rare107,910–131,890
Loop half of a keyLoop half of a key1Common11,329
Tooth half of a keyTooth half of a key1Common14,469
Uncut dragonstoneUncut dragonstone1Uncommon11,969
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare538,605–658,295
Dragon longswordDragon longsword1Common57,822
Dragon spearDragon spear1Rare35,930
BattlestaffBattlestaff180–220 (noted)Rare631,440–771,760
Rune javelinRune javelin5Rare900
Rune platebodyRune platebody1Uncommon37,480
Rune platebodyRune platebody15–25 (noted)Rare562,200–937,000
Shield left halfShield left half1Rare63,600
Dragon helmDragon helm1Uncommon58,804
Rune arrowheads 5Rune arrowheads113–137Common14,012–16,988
Onyx bolts 5Onyx bolts135–165Very rare1,055,025–1,289,475
Chaos talismanChaos talisman1Rare1,491
Nature talismanNature talisman1Rare1,124
Water talismanWater talisman65–82 (noted)Rare209,625–264,450
Earth talismanEarth talisman65–82 (noted)Rare11,180–14,104
Fire talismanFire talisman25–35 (noted)Rare8,725–12,215
Raw lobsterRaw lobster135–165 (noted)Common78,975–96,525
Raw sharkRaw shark225–275 (noted)Uncommon297,450–363,550
Big bonesBig bones68–82 (noted)Uncommon11,016–13,284
Dragon bonesDragon bones180–220 (noted)Rare458,460–560,340
CoalCoal200–1,100 (noted)Uncommon22,800–125,400
Gold oreGold ore90–110 (noted)Common30,870–37,730
Adamantite oreAdamantite ore180–220 (noted)Uncommon42,660–52,140
Adamant barAdamant bar14–16 (noted)Common18,648–21,312
Adamant barAdamant bar135–165 (noted)Rare179,820–219,780
Runite oreRunite ore90–110 (noted)Rare92,880–113,520
Rune barRune bar(noted)Common5,961
Rune barRune bar45–55 (noted)Rare89,415–109,285
Grimy torstolGrimy torstol90–110 (noted)Uncommon881,010–1,076,790
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon157,140–192,060
Super restore (4)Super restore (4)45–55 (noted)Uncommon162,585–198,715
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon178,650–218,350
Lantadyme seed 5Lantadyme seed14–16Uncommon18,130–20,720
Dwarf weed seed 5Dwarf weed seed14–16Uncommon19,880–22,720
Magic seed 5Magic seed4Uncommon323,196
Palm tree seed 5Palm tree seed10Rare604,970
FlaxFlax450–550 (noted)Common43,200–52,800
Molten glassMolten glass45–55 (noted)Common10,980–13,420
Soft claySoft clay450–550 (noted)Uncommon266,850–326,150
Yew logsYew logs68–82 (noted)Uncommon13,328–16,072
Yew logsYew logs675–825 (noted)Rare132,300–161,700
Teak plankTeak plank45–55 (noted)Uncommon12,915–15,785
Mahogany plankMahogany plank270–330 (noted)Rare212,220–259,380
Blurberry SpecialBlurberry Special1Uncommon16,746
Vecna skullVecna skull1Very rare*74,191
Hazelmere's signet ringHazelmere's signet ring1Very rare*1,626,392,973
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 rare9,003
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