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Killerwatts are Slayer monsters that require level 37 Slayer to kill. Wear insulated boots to enter the Killerwatt plane; if you are not wearing insulated boots before you enter the portal, Professor Oddenstein will warn you. If you enter without them or take them off after you are inside, you will get hit for up to ~1500 life points by the thunderclouds inside the area.

Killerwatts initially appear as passive spheres of electricity, but when they are attacked they become aggressive immediately, growing arms and a tail. Like aviantese, they will retaliate as soon as the attack option is selected, regardless of whether the player has landed a hit on them.

Killerwatt drops include common fire and Nature runes, and the occasional air or fire battlestaff drop. At around 50 Defence, food isn't required with good armour as they do not hit often. Players with level 55 Magic can use the fire and nature rune drops to turn the other drops into coins. Killerwatts also drop ashes; players can bring urns for Prayer experience.

Warning: Killerwatts are much more dangerous than their combat level suggests; both their ranged and melee attacks are as fast as dual wielded "fastest" weapons, and their ranged attacks are exceptionally accurate. Instead of relying on protection prayers, it is better to bring food and use your prayer for attack boosts. Players cannot use the Dwarf multicannon in the Killerwatt plane.

Storm cloud

A storm cloud


Killerwatt portal

The portal

Killerwatts can be found on the Killerwatt plane, by stepping through a portal on the top floor of Draynor Manor.

During the Enlightened Journey quest, it was revealed by the balloon travelling screen that killerwatts inhabit clouds. However, players cannot engage them in battle here.

Strengths and weaknessesEdit

Killerwatts use both ranged and melee, and can hit very rapidly. Their ranged attack are quite dangerous but their melee attacks are much milder. 

Their weakness is crush, therefore it is advised to bring a crush weapon such as a warhammer or mace. Wear melee armor to defend against the ranged attack; a full set of Void Knight equipment is also a good option, with its accuracy and damage bonuses.

Before the evolution of combat, slayers who didn't want to spend the money to consistently use prayer or make multiple trips would often change, skip or remove this monster. However, good tactics and the evolution of combat make these monsters relatively easy to kill.


Killerwatts attack in a manner similar to aviantese; when they are attacked regardless of whether the player can hit them, they will immediately become aggressive. This can be taken advantage of, however, as if the killerwatt lands the first strike, it will only use its weaker melee attacks. To make this happen, select a killerwatt at a distance.  You must not be standing in your target's area (you can see that the clouds form small separate territories once you know what to look for). Once the killerwatt becomes aggressive, immediately click the ground near you to avoid running towards it. Your target is now considered the "attacker" and will track you while you approach. When you get near, it will attack with melee.

There are two potentially serious mistakes you can make; you can select a target that is too close, and find yourself under heavy ranged fire. You can also accidentally click on another killerwatt while approaching your target, and be under unexpected ranged damage from the second killerwatt.  For low level fighters, damage will be immediate and serious.  Fortunately, the portal remains open at all times - if you find yourself under fire, run for the portal and exit the plane, reenter and try again. Because approaching your selected target is crucial, you might want to move in a spiral toward your selected target to avoid clicking its area until you are in melee combat. If you are having trouble managing your fights, disable 'run' and give yourself more time to plan.


100% dropsEdit

  Item Quantity Rarity GE Market Price
Impious ashes Impious ashes 1 1 Always 88


  Item Quantity Rarity GE Market Price
Air battlestaff Air battlestaff 1 3 Uncommon 8,114
Fire battlestaff Fire battlestaff 1 3 Uncommon 8,322
Staff of air Staff of air 1 3 Uncommon 601
Staff of fire Staff of fire 1 3 Uncommon 595
Mystic fire staff Mystic fire staff 1 3 Uncommon 24,867


Charm drop percentages
No charms Gold charm Green charm Crimson charm Blue charm






Represents 90% confidence range, based on a sample of 22,851 kills.
1 charm is dropped at a time.

Please add to the log (only if 50 or more creatures killed).


  Item Quantity Rarity GE Market Price
Grimy guam Grimy guam 1 2 Common 901
Grimy marrentill Grimy marrentill 1 2 Common 79
Grimy tarromin Grimy tarromin 1 2 Common 35
Grimy harralander Grimy harralander 1 2 Common 202
Grimy ranarr Grimy ranarr 1 3 Uncommon 3,127
Grimy irit Grimy irit 1 3 Uncommon 3,054
Grimy avantoe Grimy avantoe 1 3 Uncommon 4,770
Grimy kwuarm Grimy kwuarm 1 3 Uncommon 4,828
Grimy cadantine Grimy cadantine 1 3 Uncommon 2,126
Grimy lantadyme Grimy lantadyme 1 4 Rare 9,048
Grimy dwarf weed Grimy dwarf weed 1 4 Rare 10,802


  Item Quantity Rarity GE Market Price
Air rune Air rune 5–17 2 Common 110–374
Fire rune Fire rune 18–45 2 Common 576–1,440
Chaos rune Chaos rune 4 3 Uncommon 164
Nature rune Nature rune 4–37 2 Common 1,120–10,360
Steam rune Steam rune 2 3 Uncommon 86
Death rune Death rune 2 3 Uncommon 286


  Item Quantity Rarity GE Market Price
Coins 100 Coins 11–200 2 Common Not sold
Cannonball Cannonball 3 3 Uncommon 1,200
Fire orb Fire orb 2 3 Uncommon 4,630
Ashes Soda ash 4 3 Uncommon 2,088
Spirit sapphire Spirit sapphire 1 4 Rare Not sold
Spirit emerald Spirit emerald 1 4 Rare Not sold
Spirit ruby Spirit ruby 1 4 Rare Not sold
Ancient effigy Starved ancient effigy 1 5 Very rare Not sold

Rare drop table dropsEdit

This monster has access to the rare drop table.
The ring of wealth is not required to access the table.
Show/hide rare drop table
Item Quantity Rarity GE Market Price
Coins 250 Coins 250 – 450; 3,000;
9,000; 10,000; 12,000
2 Common Not sold
Uncut sapphire Uncut sapphire 1 2 Common 1,408
Uncut emerald Uncut emerald 1 2 Common 2,726
Uncut ruby Uncut ruby 1 2 Common 3,628
Uncut diamond Uncut diamond 1 3 Uncommon 6,577
Loop half of a key Loop half of a key 1 3 Uncommon 19,061
Tooth half of a key Tooth half of a key 1 3 Uncommon 40,664
Uncut dragonstone Uncut dragonstone 1 4 Rare 16,094
Dragonstone Dragonstone 1 4 Rare 10,248
Dragon dagger Dragon dagger 1 3 Uncommon 16,370
Rune battleaxe Rune battleaxe 1 4 Rare 24,178
Rune javelin Rune javelin 5 4 Rare 900
Adamant javelin Adamant javelin 20 5 Very rare 1,220
Rune 2h sword Rune 2h sword 1 5 Very rare 37,415
Rune spear Rune spear 1 5 Very rare 11,383
Dragon spear Dragon spear 1 5 Very rare 36,247
Dragon dagger Dragon dagger 50 (noted) 5 Very rare 818,500
Rune sq shield Rune sq shield 1 5 Very rare 22,368
Rune kiteshield Rune kiteshield 1 5 Very rare 31,850
Shield left half Shield left half 1 5 Very rare 64,133
Dragon helm Dragon helm 1 5 Very rare 59,345
Adamant bolts 5 Adamant bolts 200 3 Uncommon 20,400
Onyx bolts 5 Onyx bolts 150 4 Rare 1,264,050
Rune arrow 5 Rune arrow 150–200, 500 4 Rare 21,750–72,500
Battlestaff Battlestaff 200 (noted) 4 Rare 1,634,200
Vecna skull Vecna skull 1 5 Very rare 90,003
Water talisman Water talisman 1 3 Uncommon 13,093
Earth talisman Earth talisman 25–35 (noted) 3 Uncommon 89,725–125,615
Fire talisman Fire talisman 25–35 (noted) 3 Uncommon 96,000–134,400
Chaos talisman Chaos talisman 1 3 Uncommon 947
Nature talisman Nature talisman 1 3 Uncommon 288
Pure essence Pure essence 500–15,000 (noted) 3 Uncommon 7,500–225,000
Nature rune Nature rune 20–80 4 Rare 5,600–22,400
Soul rune Soul rune 20 4 Rare 2,960
Law rune Law rune 45 4 Rare 11,700
Death rune Death rune 50, 121 4 Rare 7,150–17,303
Blood rune Blood rune 50 4 Rare 12,300
Raw swordfish Raw swordfish 125–250, 1,000 (noted) 3 Uncommon 52,750–422,000
Raw shark Raw shark 250–500 (noted) 3 Uncommon 450,500–901,000
Big bones Big bones 150–500 (noted) 3 Uncommon 97,950–326,500
Coal Coal 150–7,500 (noted) 3 Uncommon 34,650–1,732,500
Adamantite ore Adamantite ore 150–800 (noted) 3 Uncommon 301,500–1,608,000
Silver ore Silver ore 100 (noted) 4 Rare 10,400
Runite ore Runite ore 100 (noted) 4 Rare 1,128,700
Adamant bar Adamant bar 1,000–7,000 (noted) 4 Rare 3,264,000–22,848,000
Rune bar Rune bar 1, 50 (noted) 4 Rare 14,213–710,650
Clean toadflax Clean toadflax 25–250 (noted) 3 Uncommon 129,250–1,292,500
Clean snapdragon Clean snapdragon 30–120 (noted) 3 Uncommon 128,910–515,640
Clean torstol Clean torstol 10–100 (noted) 3 Uncommon 75,720–757,200
Watermelon seed 5 Watermelon seed 3 3 Uncommon 6,666
Yew seed 5 Yew seed 1–50 4 Rare 67,575–3,378,750
Magic seed 5 Magic seed 1–7 4 Rare 136,195–953,365
Palm tree seed 5 Palm tree seed 10 4 Rare 1,055,080
Herb seed 5 Snapdragon seed 1 4 Rare 1,998
Yew logs Yew logs 50–20,000 (noted) 4 Rare 20,550–8,220,000
Crystal triskelion fragment 1 Crystal triskelion fragment 1 1 5 Very rare Not sold
Crystal triskelion fragment 2 Crystal triskelion fragment 2 1 5 Very rare Not sold
Crystal triskelion fragment 3 Crystal triskelion fragment 3 1 5 Very rare Not sold
Brawling gloves (Melee) Brawling gloves (Melee) 1 5 Very rare Not sold
Brawling gloves (Magic) Brawling gloves (Magic) 1 5 Very rare Not sold
Brawling gloves (Ranged) Brawling gloves (Ranged) 1 5 Very rare Not sold
Brawling gloves (Agility) Brawling gloves (Agility) 1 5 Very rare Not sold
Brawling gloves (Cooking) Brawling gloves (Cooking) 1 5 Very rare Not sold
Brawling gloves (FM) Brawling gloves (FM) 1 5 Very rare Not sold
Brawling gloves (Fishing) Brawling gloves (Fishing) 1 5 Very rare Not sold
Brawling gloves (Hunter) Brawling gloves (Hunter) 1 5 Very rare Not sold
Brawling gloves (Mining) Brawling gloves (Mining) 1 5 Very rare Not sold
Brawling gloves (Prayer) Brawling gloves (Prayer) 1 5 Very rare Not sold
Brawling gloves (Smithing) Brawling gloves (Smithing) 1 5 Very rare Not sold
Brawling gloves (Thieving) Brawling gloves (Thieving) 1 5 Very rare Not sold
Brawling gloves (WC) Brawling gloves (WC) 1 5 Very rare Not sold

Universal dropsEdit

Universal drops are dropped by nearly every monster outside of Daemonheim.
These drops are dropped alongside main drops.
  Item Quantity Rarity GE Market Price
Key token Key token 1 4 Rare Not sold


  • The name is a play on "kilowatt", a unit of power, with the word "killer" included to imply their hostility, or that they may give a deadly amount of watts.
  • During the Enlightened Journey quest, it is revealed that Killerwatts live in the clouds over Gielinor.
  • In the Balloon transport system, the images of Killerwatts are what they looked like before their graphical update.

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