Thermonuclear smoke devil

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This article is about the boss. For the Slayer monster, see Smoke devil.
Not to be confused with Nuclear smoke devil.
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This article has a money making guide here: Killing the Thermonuclear smoke devil.
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The Thermonuclear smoke devil, often referred to as Thermy, is the boss version of the Smoke devil, found in the Smoke Devil Dungeon. These require a minimum of 93 Slayer to kill. Located at the Smoke Devil Dungeon south of Castle Wars, the Thermonuclear smoke devil can only be attacked on a smoke devil task, with the exception of one kill for the Western Provinces Diary (provided that the player has 93 Slayer without boosting).

It is the only monster to drop the Smoke battlestaff and the pet smoke devil. Their non-boss variants also has a chance to drop the occult necklace, but at a lower drop chance.

A dwarf multicannon cannot be used inside the boss room. If attempted, the cannon will be destroyed (similar to areas like at KBD or KQ).

Drops[edit | edit source]

Drop rates estimated based on 79,084 kills from the Old School RuneScape Wiki drop log project, unless otherwise cited.

An average Thermonuclear smoke devil kill is worth 23,695.

100%[edit | edit source]

Item Quantity Rarity Price High Alch
Ashes.png: Thermonuclear smoke devil drops Ashes with rarity Always in quantity 1Ashes1Always341

Unique[edit | edit source]

Item Quantity Rarity Price High Alch
Occult necklace.png: Thermonuclear smoke devil drops Occult necklace with rarity 1/350 in quantity 1Occult necklace11/350[1]847,65027,000
Smoke battlestaff.png: Thermonuclear smoke devil drops Smoke battlestaff with rarity 1/512 in quantity 1Smoke battlestaff11/512[1]2,717,3629,300
Dragon chainbody.png: Thermonuclear smoke devil drops Dragon chainbody with rarity 1/2,000 in quantity 1Dragon chainbody11/2,000[1]807,076150,000

Armour and weaponry[edit | edit source]

Item Quantity Rarity Price High Alch
Rune dagger.png: Thermonuclear smoke devil drops Rune dagger with rarity 5/128 in quantity 1Rune dagger15/1284,5234,800
Rune chainbody.png: Thermonuclear smoke devil drops Rune chainbody with rarity 4/128 in quantity 1Rune chainbody14/12829,60930,000
Red d'hide body.png: Thermonuclear smoke devil drops Red d'hide body with rarity 3/128 in quantity 1Red d'hide body13/1286,2266,738
Rune battleaxe.png: Thermonuclear smoke devil drops Rune battleaxe with rarity 3/128 in quantity 1Rune battleaxe13/12824,58424,960
Mystic air staff.png: Thermonuclear smoke devil drops Mystic air staff with rarity 3/128 in quantity 1Mystic air staff13/12825,20625,500
Mystic fire staff.png: Thermonuclear smoke devil drops Mystic fire staff with rarity 3/128 in quantity 1Mystic fire staff13/12825,20625,500
Rune scimitar.png: Thermonuclear smoke devil drops Rune scimitar with rarity 2/128 in quantity 1Rune scimitar12/12815,05315,360
Dragon scimitar.png: Thermonuclear smoke devil drops Dragon scimitar with rarity 1/128 in quantity 1Dragon scimitar11/12859,72860,000
Ancient staff.png: Thermonuclear smoke devil drops Ancient staff with rarity 1/128 in quantity 1Ancient staff11/12885,66660,000

Runes and ammunition[edit | edit source]

Item Quantity Rarity Price High Alch
Smoke rune.png: Thermonuclear smoke devil drops Smoke rune with rarity 10/128 in quantity 100Smoke rune10010/1286,9001,200
Air rune.png: Thermonuclear smoke devil drops Air rune with rarity 8/128 in quantity 300Air rune3008/1281,500600
Soul rune.png: Thermonuclear smoke devil drops Soul rune with rarity 8/128 in quantity 60Soul rune608/1288,64010,800
Rune arrow.png: Thermonuclear smoke devil drops Rune arrow with rarity 2/128 in quantity 100Rune arrow1002/1288,10024,000
Rune knife(p++).png: Thermonuclear smoke devil drops Rune knife(p++) with rarity 1/128 in quantity 50Rune knife(p++)501/12819,9504,950

Consumables[edit | edit source]

Item Quantity Rarity Price High Alch
Ugthanki kebab.png: Thermonuclear smoke devil drops Ugthanki kebab with rarity 4/128 in quantity 3Ugthanki kebab34/1281,95336
Tuna potato.png: Thermonuclear smoke devil drops Tuna potato with rarity 3/128 in quantity 3Tuna potato33/1283,441201
Sanfew serum(4).png: Thermonuclear smoke devil drops Sanfew serum(4) with rarity 3/128 in quantity 2Sanfew serum(4)23/12840,550360
Prayer potion(4).png: Thermonuclear smoke devil drops Prayer potion(4) with rarity 1/128 in quantity 2Prayer potion(4)21/12818,604228

Herbs and seeds[edit | edit source]

Item Quantity Rarity Price High Alch
Grimy toadflax.png: Thermonuclear smoke devil drops Grimy toadflax with rarity 2/128 in quantity 15 (noted)Grimy toadflax15 (noted)2/12824,630165
Snapdragon seed.png: Thermonuclear smoke devil drops Snapdragon seed with rarity 2/128 in quantity 2Snapdragon seed22/12899,03272
Magic seed.png: Thermonuclear smoke devil drops Magic seed with rarity 1/128 in quantity 1Magic seed11/128[1]114,477253

Materials[edit | edit source]

Item Quantity Rarity Price High Alch
Pure essence.png: Thermonuclear smoke devil drops Pure essence with rarity 5/128 in quantity 300 (noted)Pure essence300 (noted)5/128600600
Desert goat horn.png: Thermonuclear smoke devil drops Desert goat horn with rarity 2/128 in quantity 50 (noted)Desert goat horn50 (noted)2/12810,700350
Molten glass.png: Thermonuclear smoke devil drops Molten glass with rarity 2/128 in quantity 100 (noted)Molten glass100 (noted)2/12815,100100
Mithril bar.png: Thermonuclear smoke devil drops Mithril bar with rarity 2/128 in quantity 20 (noted)Mithril bar20 (noted)2/12812,5803,600
Coal.png: Thermonuclear smoke devil drops Coal with rarity 2/128 in quantity 150 (noted)Coal150 (noted)2/12820,1004,050
Onyx bolt tips.png: Thermonuclear smoke devil drops Onyx bolt tips with rarity 2/128 in quantity 12Onyx bolt tips122/12898,5807,200
Magic logs.png: Thermonuclear smoke devil drops Magic logs with rarity 2/128 in quantity 20 (noted)Magic logs20 (noted)2/12820,8203,840
Gold ore.png: Thermonuclear smoke devil drops Gold ore with rarity 2/128 in quantity 200 (noted)Gold ore200 (noted)2/12874,40018,000
Grapes.png: Thermonuclear smoke devil drops Grapes with rarity 1/128 in quantity 100 (noted)Grapes100 (noted)1/1289,5000
Diamond.png: Thermonuclear smoke devil drops Diamond with rarity 1/128 in quantity 10 (noted)Diamond10 (noted)1/12819,99012,000

Other[edit | edit source]

Item Quantity Rarity Price High Alch
Coins_10000.png: Thermonuclear smoke devil drops Coins with rarity 15/128 in quantity 10000-20000Coins10,000–20,00015/12810,000-20,00010,000-20,000
Tinderbox.png: Thermonuclear smoke devil drops Tinderbox with rarity 10/128 in quantity 1Tinderbox110/12840
Fire talisman.png: Thermonuclear smoke devil drops Fire talisman with rarity 4/128 in quantity 1Fire talisman14/1282,9202
Bullseye lantern.png: Thermonuclear smoke devil drops Bullseye lantern with rarity 3/128 in quantity 1Bullseye lantern13/1281,422252
Dragonstone ring.png: Thermonuclear smoke devil drops Dragonstone ring with rarity 1/128 in quantity 1Dragonstone ring11/12812,06510,575
Crystal key.png: Thermonuclear smoke devil drops Crystal key with rarity 1/128 in quantity 1Crystal key11/128[2]22,72190

Gem drop table[edit | edit source]

There is a 3/128 chance of rolling the gem drop table.

Item Quantity Rarity Price High Alch
Uncut sapphire.png: Thermonuclear smoke devil drops Uncut sapphire with rarity 1/170.67 in quantity 1Uncut sapphire11/170.67; 1/86.67[d 1]61715
Uncut emerald.png: Thermonuclear smoke devil drops Uncut emerald with rarity 1/341.33 in quantity 1Uncut emerald11/341.33; 1/173.33[d 1]77230
Uncut ruby.png: Thermonuclear smoke devil drops Uncut ruby with rarity 1/682.67 in quantity 1Uncut ruby11/682.67; 1/346.67[d 1]1,38260
Nature talisman.png: Thermonuclear smoke devil drops Nature talisman with rarity 1/1,820.44 in quantity 1Nature talisman11/1,820.44; 1/924.44[d 1]6022
Uncut diamond.png: Thermonuclear smoke devil drops Uncut diamond with rarity 1/2,730.67 in quantity 1Uncut diamond11/2,730.67; 1/1,386.67[d 1]2,784120
Loop half of key.png: Thermonuclear smoke devil drops Loop half of key with rarity 1/5,461.33 in quantity 1Loop half of key11/5,461.33; 1/2,773.33[d 1]11,11760
Tooth half of key.png: Thermonuclear smoke devil drops Tooth half of key with rarity 1/5,461.33 in quantity 1Tooth half of key11/5,461.33; 1/2,773.33[d 1]11,04260
Rune javelin.png: Thermonuclear smoke devil drops Rune javelin with rarity 1/5,461.33 in quantity 5Rune javelin51/5,461.33; 1/2,773.33[d 1]8551,200
Rune spear.png: Thermonuclear smoke devil drops Rune spear with rarity 1/87,381.33 in quantity 1Rune spear11/87,381.33; 1/5,200[d 1][d 2]12,00812,480
Shield left half.png: Thermonuclear smoke devil drops Shield left half with rarity 1/174,762.67 in quantity 1Shield left half11/174,762.67; 1/10,400[d 1][d 2]65,51066,000
Dragon spear.png: Thermonuclear smoke devil drops Dragon spear with rarity 1/233,016.89 in quantity 1Dragon spear11/233,016.89; 1/13,866.67[d 1][d 2]37,35737,440
  1. 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 The drop rate of this item is increased when wearing a Ring of wealth.
  2. 2.0 2.1 2.2 The Rune spear, Shield left half and Dragon spear will only be dropped if Legend's Quest has been started, or else a talisman will be dropped as a replacement.

Tertiary[edit | edit source]

Item Quantity Rarity Price High Alch
Brimstone key.png: Thermonuclear smoke devil drops Brimstone key with rarity 1/59.8 in quantity 1Brimstone key11/59.8[d 1][3]Not soldN/A
Clue scroll (hard).png: Thermonuclear smoke devil drops Clue scroll (hard) with rarity 1/96 in quantity 1Clue scroll (hard)11/96[4]Not sold12
Clue scroll (elite).png: Thermonuclear smoke devil drops Clue scroll (elite) with rarity 1/500 in quantity 1Clue scroll (elite)11/500[1]Not sold12
Pet smoke devil.png: Thermonuclear smoke devil drops Pet smoke devil with rarity 1/3,000 in quantity 1Pet smoke devil11/3,000[5]Not soldN/A
  1. A Brimstone key is only dropped if killed on a slayer assignment given by Konar quo Maten.

Changes[edit | edit source]

Date Changes
22 May 2014
(update)
When Thermy drops a clue scroll, it now appears at the correct place on the ground.
Thermy and the Cave kraken boss now have 'Attack' options, rather than 'Fight'.

Trivia[edit | edit source]

  • The thermonuclear smoke devil was graphically updated on 27 September 2018 as part of a update. Prior to the update, it was simply a larger version of the smoke devils scattered across the dungeon.
  • The thermonuclear smoke devil and the Kraken are the only slayer bosses that can be fought with another player.

References[edit | edit source]

  1. 1.0 1.1 1.2 1.3 1.4 Envision. "Drop Rates V2." RuneScape Forums.
  2. Jagex. Mod Ash's Twitter account. 9 Mar 2016. Mod Ash: "1/128. I hope you got some other decent stuff while that was going on."
  3. Jagex. Mod Kieren's Twitter account. 16 January 2019. Mod Kieren: "It follows a curve up until level 100 then scales linearly between those 2 values upto level 350 combat. Creatures over thsi[sic] will cap at 1/50. [1]"
  4. Jagex. The Kebos Lowlands. 10 Jan 2019. (Archived from the original on 15 Mar 2019.)*
  5. Jagex. Mod JohnC's Twitter account. 15 Sep 2014. (Archived from the original on 15 Sep 2014.) Mod JohnC: "Kraken, Thermy & Penance Queen pet drop rates - DKS for the final reveal next week!"