Thermonuclear Smoke Devil Guide: Occult Farming

By Expos.GG Team · 2026-01-29

Kill Thermonuclear Smoke Devil for the Occult necklace and Smoke battlestaff. Complete Slayer boss guide.

Overview

The Thermonuclear Smoke Devil (Thermy) is a Slayer boss requiring 93 Slayer. It drops the valuable Occult necklace and Smoke battlestaff.

Requirements

- 93 Slayer (required) - Smoke devil Slayer task - Facemask or Slayer helm - 85+ Magic recommended

Getting There

1. Travel to Smoke Devil Dungeon 2. Located west of Castle Wars 3. Fairy ring B-L-P nearby

Gear Setup

Magic Setup (Recommended) - Weapon: Trident of the swamp or Sang staff - Head: Slayer helm (i) - Body: Ahrim's or Ancestral - Legs: Ahrim's or Ancestral - Cape: God cape (i) - Gloves: Tormented bracelet - Boots: Eternal boots - Ring: Magus ring or Seers ring (i)

Melee Alternative - Works but slower - Bring Arclight or whip - Less efficient

Inventory - 2-4 Prayer potions - Super restore (for stats) - Sharks or better - Rune pouch - House teleport

Mechanics

Simple Boss Thermy has very basic mechanics: - Standard Magic attack - Melee attack up close - Protect from Magic blocks all magic damage

AFK Potential - Very AFK boss - Prayer flick not required - Simple rotation

Strategy

Basic Strategy 1. Protect from Magic 2. Attack with Magic (Trident) 3. Kill small smoke devils if spawned 4. Repeat

Optimal DPS - Use Augury if available - Magic potion for boost - Thralls for extra damage

Kills Per Trip

With proper gear: 10-20 kills per trip

Drops

| Item | Price | Rate | |------|-------|------| | Occult necklace | 800k-1M | 1/350 | | Smoke battlestaff | 1.5-2M | 1/512 | | Jar of smoke | 50k | 1/2,000 | | Pet smoke devil | - | 1/3,000 |

Regular Drops - Dragon chainbody - Rune items - Various seeds

GP/Hour - Average: 1.5-2M

Comparison to Regular Smoke Devils

| Aspect | Regular | Thermy | |--------|---------|--------| | Kills/Hour | 200+ | 40-50 | | GP/Hour | 800k | 1.5-2M | | Effort | Low | Very Low | | Unique chance | Lower | Higher |

Tips

1. Pray Magic always - Blocks all magic damage 2. Use Trident - Best weapon choice 3. AFK friendly - Very relaxed boss 4. Kill small devils - They can pile up 5. Occult is BiS - Great necklace drop

Small Smoke Devils

While at Thermy, you can also kill regular smoke devils: - Use burst/barrage - 800k-1M GP/hour - Faster Slayer XP

Need Thermy KC?

Farm Thermonuclear Smoke Devil for Occult drops.