OSRS Thermonuclear Smoke Devil Guide for Efficient Slayer Kills
The Thermonuclear Smoke Devil, affectionately called “Thermy,” is a high-level Slayer boss in Old School RuneScape (OSRS) that offers rewarding loot and engaging combat for players with 93 Slayer. Found in the Smoke Devil Dungeon near Castle Wars, this boss is a variant of the regular smoke devil, requiring specific strategies and gear to maximize efficiency. Whether you’re chasing the elusive pet smoke devil, the valuable smoke battlestaff, or simply aiming to complete your Slayer task, this guide covers everything you need to know to conquer Thermy.
Thermy is a unique boss that can only be fought on a smoke devil Slayer task, with the exception of one kill for the Western Provinces Diary (if you have 93 Slayer). Its high Slayer requirement makes it a late-game challenge, but the fight itself is mechanically straightforward, allowing for 60–100 kills per hour with the right setup. The boss is weak to magic, making it an excellent target for mages, though melee setups are also viable.
Location and Access
The Thermonuclear Smoke Devil resides in a dedicated chamber within the Smoke Devil Dungeon, south of Castle Wars. To reach it:
- Teleport to Castle Wars using a ring of dueling or minigame teleport.
- Run southwest to find the dungeon entrance.
- Navigate northwest inside the dungeon to locate the crevice leading to Thermy’s lair.
A Slayer helmet or facemask is mandatory to avoid taking damage from the dungeon’s smoky environment.
Requirements
Before taking on Thermy, ensure you meet these prerequisites:
- 93 Slayer (non-boostable for regular tasks).
- An active smoke devil Slayer task (except for the diary kill).
- High combat stats (80+ Magic or Melee recommended).
- Access to teleports for quick travel (e.g., ring of dueling).
Best Gear Setups for Thermonuclear Smoke Devil
Your gear choice significantly impacts your kill speed and trip duration. Since Thermy has low magic defense, magic-based setups are the most efficient, but melee is a solid alternative for players preferring close combat.
Magic Gear Setup
Magic is the preferred method due to Thermy’s weakness and the ability to use Ancient Magicks for crowd control. Here’s a recommended setup:
| Slot | Item |
|---|---|
| Head | Slayer helmet (i) or Ancestral hat |
| Neck | Occult necklace |
| Body | Ancestral robe top or Ahrim’s robetop |
| Legs | Ancestral robe bottom or Ahrim’s robeskirt |
| Weapon | Kodai wand or Master wand |
| Shield | Arcane spirit shield or Book of darkness |
| Cape | Imbued god cape |
| Boots | Eternal boots or Infinity boots |
| Gloves | Tormented bracelet |
| Ring | Seers ring (i) |
Inventory: Runes for Ice Barrage or Ice Blitz, prayer potions, divine super combat potion, stamina potions, high-healing food (e.g., sharks or manta rays), and a teleport.
Melee Gear Setup
Melee is viable for players with high Strength and Attack, especially if you lack the funds for top-tier magic gear. Recommended setup:
| Slot | Item |
|---|---|
| Head | Slayer helmet (i) or Serpentine helm |
| Neck | Amulet of torture |
| Body | Bandos chestplate or Torag’s platebody |
| Legs | Bandos tassets or Torag’s platelegs |
| Weapon | Abyssal whip or Dragon scimitar |
| Cape | Fire cape or Skillcape (trimmed) |
| Boots | Primordial boots or Dragon boots |
| Gloves | Barrows gloves |
| Ring | Berserker ring (i) |
Inventory: Divine super combat potions, prayer potions, stamina potions, high-healing food, and a teleport.
Combat Strategies for Thermonuclear Smoke Devil
Thermy’s fight is simple but requires attention to avoid unnecessary damage. The boss uses a magic-based attack that hits consistently, so proper positioning and prayer management are key.
Magic Strategy: Ice Barrage Method
Using Ice Barrage maximizes efficiency by freezing Thermy in place, allowing you to attack from a safe distance. Follow these steps:
- Positioning: Stand on a marked tile (use RuneLite for tile markers) when Thermy spawns.
- Freeze: Cast Ice Barrage to freeze Thermy, then move to a safe tile out of its attack range.
- Attack: Use your strongest magic spell (e.g., Fire Surge) while keeping Augury active.
- Refreeze: If Thermy unfreezes, cast Ice Barrage again and reposition.
- Prayer Management: Use redemption to heal when low on health, supplemented by prayer renewal potions.
This method minimizes damage taken and extends trips, making it ideal for long sessions.
Melee Strategy: Walk-Under Method
Melee users can employ the walk-under method to avoid damage:
- Activate Piety: Turn on Piety and attack Thermy with a 4-tick weapon like an abyssal whip.
- Walk Under: After each hit, immediately walk under Thermy to avoid its attack. Enable “Shift-click Walk here” in RuneLite for smoother movement.
- Eat Safely: When eating, stand under Thermy to pause its attacks.
- Restore Stats: Use an Ornate Rejuvenation Pool in your Player-Owned House between kills to restore stats efficiently.
This method is click-intensive but effective for high-DPS melee setups.
Loot and Rewards from Thermonuclear Smoke Devil
Thermy’s loot table includes valuable items that make it a profitable boss to farm. On average, you can expect 500,000–700,000 GP per hour, depending on luck and kill speed.
Notable Drops
Here are the standout items you can obtain:
- Smoke battlestaff: A rare drop worth millions, ideal for mages.
- Occult necklace: Boosts magic damage by 5%, highly sought after by Ironmen and mages.
- Pet smoke devil: A prestigious pet that can switch between regular and thermonuclear forms via Metamorphosis.
- Dragon chainbody: A less common but valuable drop.
Regular drops include high-value alchables like rune items, making every kill worthwhile.
Loot Table Overview
| Item | Drop Rate | Approximate Value |
|---|---|---|
| Smoke battlestaff | 1/512 | ~2M GP |
| Occult necklace | 1/350 | ~600K GP |
| Pet smoke devil | 1/3,000 | Untradeable |
| Dragon chainbody | 1/2,000 | ~300K GP |
These drop rates are estimates based on community data and may vary.
Tips for Maximizing Efficiency
To get the most out of your Thermy sessions, consider these practical tips:
Preparation and Inventory Management
- Restock Wisely: Bring stamina potions to maintain run energy in the dungeon.
- Bank Often: Use Castle Wars teleports to bank and restock quickly.
- Prayer Efficiency: Sip prayer potions conservatively to extend trips.
Optimizing Kills Per Hour
- Use RuneLite: Tile markers and inventory tags simplify positioning and item management.
- Practice Timing: Master the Ice Barrage or walk-under rhythm to minimize downtime.
- Upgrade Gear: Invest in items like the Kodai wand or Ancestral robes for faster kills.
Dealing with Mistakes
If things go wrong:
- Teleport Out: Carry a teleport to escape if low on health.
- Reassess Gear: Downgrade to budget gear if you’re taking too much damage.
- Check Task: Ensure you’re on a smoke devil task to avoid wasting time.
With practice, Thermy becomes a reliable source of Slayer XP, profit, and rare loot. Whether you’re a seasoned mage or a melee enthusiast, this boss offers a rewarding challenge. Equip your Slayer helmet tolerable=”true”>, stock up on potions, and dive into the Smoke Devil Dungeon to take on the Thermonuclear Smoke Devil!