Slayer bosses
Thermonuclear smoke devil
“Woah.”
The thermonuclear smoke devil, often referred to as thermy, is the boss version of the smoke devil. It requires a minimum of 93 Slayer to damage. 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).
Combat
Attack styles
- Magic
Max hit
- 8 (Magic)
Drops
| Item | Quantity | Rarity | Value |
|---|---|---|---|
 | 1 | always | 2 gp |
 | 10000-30000 | 1/5 | 1 gp |
 | 150 | 1/12 | 10 gp |
 | 300 | 1/14 | 4 gp |
 | 60 | 1/14 | 300 gp |
 | 1 | 1/23 | 8,000 gp |
 | 1 | 1/27 | 50,000 gp |
 | 3 | 1/37 | 190 gp |
 | 3 | 1/39 | 113 gp |
 | 3 | 1/39 | 300 gp |
 | 1 | 1/39 | 11,230 gp |
 | 1 | 1/39 | 41,600 gp |
 | 1 | 1/39 | 42,500 gp |
 | 1 | 1/39 | 42,500 gp |
 | 300 (noted) | 1/55 | 4 gp |
 | 100 (noted) | 1/55 | 3 gp |
 | 20 (noted) | 1/55 | 300 gp |
 | 150 (noted) | 1/55 | 45 gp |
 | 20 (noted) | 1/55 | 320 gp |
 | 200 (noted) | 1/55 | 150 gp |
 | 150 | 1/58 | 400 gp |
 | 50 (noted) | 1/58 | 12 gp |
 | 15 (noted) | 1/58 | 19 gp |
 | 12 | 1/58 | 1,000 gp |
 | 2 | 1/58 | 60 gp |
 | 1 | 1/58 | 25,600 gp |
 | 1 | 1/79 | 100,000 gp |
 | 10 (noted) | 1/108 | 2,000 gp |
 | 1 | 1/115 | 100,000 gp |
 | 3 | 1/115 | 20 gp |
 | 1 | 1/115 | 1 gp |
 | 1 | 1/115 | 4 gp |
 | 1 | 1/115 | 420 gp |
 | 100 (noted) | 1/115 | 1 gp |
 | 1 | 1/115 | 422 gp |
 | 1 | 1/115 | 17,625 gp |
 | 1 | 1/115 | 150 gp |
 | 50 | 1/115 | 166 gp |
Boss information and pictures from the Old School RuneScape Wiki (CC BY-NC-SA 3.0).