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RuneScape 3 icon
Release date 20 feb 2006 (Update unknown) edit
Members? Yes
Combat 55
Hit points 51
Slayer level 37
Slayer XP 51
Aggressive No
Poisonous No
Immune to poison? No
Attack style Melee, Magical Ranged
Attack speed Monster attack speed 8
Max hit 6
Weakness Stab
Always drops Ashes
A ball of electrical energy.
Killerwatt icon

Killerwatts are Slayer monsters located through a portal on the top floor of Draynor Manor that require level 37 Slayer to kill. Players are suggested to wear insulated boots to enter the Killerwatt plane and to fight them; if you are not wearing insulated boots before you enter the portal, Professor Oddenstein will warn the player; giving them the option of whether or not to go in. If you put them on after you are inside, you will get hit for 1-14 hitpoints by the thunderclouds inside the area.

Warning: Killerwatts are much more dangerous than what their combat level may suggest; both their ranged and melee attacks will hit players every 1.2 seconds, much faster than the speed of an abyssal whip  or scimitars, and their melee attacks are exceptionally accurate, although Prayer Flicking is still possible despite their attack speed. Using Ranged or Magic from across clouds will limit them to their ranged attack, allowing players with prayer to safely complete this Slayer task. As usual, using the protect from melee prayer will prevent all melee damage if a player has brought high ranged defence gear. The protect from missiles prayer will prevent all ranged damage. Their ranged attack is magic based, and thus high magic defence armour such as dragonhide will provide the best defence against the ranged attack.

There is a way to prevent the killerwatts from using their ranged attack; effectively greatly reducing their damage rate, and allowing you to fight them in metal armours. They will not attack you with ranged attacks unless you strike first. Therefore, when using a melee weapon, you can click the killerwatt from a distance, and then click the ground to stop moving towards the killerwatt. Turning run off will make it much easier to stop yourself before you strike the killerwatt. This will make the killerwatt aggressive to you, and it will approach and attack you in melee, striking you first. With auto-retaliate on, you can retaliate without triggering their ranged attack. If you accidentally strike a killerwatt first, you can use protect from missiles and/or retreat through the portal. After returning through the portal, the killerwatt will no longer be aggressive towards you, but you also can not attack it without triggering its ranged attacks until it reverts to its base form.

Drops Edit

100% drop Edit

Item Quantity Rarity
Ashes Ashes 1 1; Always

Weapons/Armour Edit

Item Quantity Rarity
Staff of fire Staff of fire 1 3; Uncommon
Staff of air Staff of air 1 3; Uncommon
Fire battlestaff Fire battlestaff 1 3; Uncommon
Air battlestaff Air battlestaff 1 3; Uncommon
Mystic fire staff Mystic fire staff 1 3; Uncommon


Item Quantity Rarity
Guam leaf Guam leaf 1 2; Common
Marrentill Marrentill 1 2; Common
Tarromin Tarromin 1 2; Common
Harralander Harralander 1 2; Common
Ranarr weed Ranarr weed 1 3; Uncommon
Irit leaf Irit leaf 1 3; Uncommon
Avantoe Avantoe 1 3; Uncommon
Kwuarm Kwuarm 1 3; Uncommon
Cadantine Cadantine 1 3; Uncommon
Lantadyme Lantadyme 1 4; Rare
Dwarf weed Dwarf weed 1 4; Rare

Runes Edit

Item Quantity Rarity
Air rune Air rune 5; 17 2; Common
Fire rune Fire rune 18; 45 2; Common
Nature rune Nature rune 8; 37 3; Uncommon
Chaos rune Chaos rune 4 3; Uncommon
Death rune Death rune 2 3; Uncommon
Steam rune Steam rune 2 3; Uncommon

Other Edit

Item Quantity Rarity
Coins 100 Coins 11–21; 44; 127; 156; 200 2; Common
Cannonball Cannonball 3 3; Uncommon
Fire orb Fire orb 2 3; Uncommon
Soda ash Soda ash 4 3; Uncommon

Rare drop table

In addition to the drops above, this monster also has access to the rare drop table.

Show/hide rare drop table
Item Quantity Rarity
Coins 100 Coins 3,000 2; Common
Uncut sapphire Uncut sapphire 1 2; Common
Loop half of key Loop half of key 1 2; Common
Tooth half of key Tooth half of key 1 2; Common
Uncut emerald Uncut emerald 1 3; Uncommon
Uncut ruby Uncut ruby 1 3; Uncommon
Nature talisman Nature talisman 1 3; Uncommon
Chaos talisman Chaos talisman 1 3; Uncommon
Nature rune Nature rune 67 3; Uncommon
Runite bar Runite bar 1 3; Uncommon
Rune spear Rune spear 1 4; Rare
Rune battleaxe Rune battleaxe 1 4; Rare
Rune 2h sword Rune 2h sword 1 4; Rare
Uncut diamond Uncut diamond 1 4; Rare
Rune javelin Rune javelin 5 4; Rare
Silver ore Silver ore 100 (noted) 4; Rare
Adamant javelin Adamant javelin 20 4; Rare
Rune sq shield Rune sq shield 1 4; Rare
Steel arrow 5 Steel arrow 150 4; Rare
Rune arrow 5 Rune arrow 42 4; Rare
Law rune Law rune 45 4; Rare
Death rune Death rune 45 4; Rare
Dragonstone Dragonstone 1 4; Rare
Rune kiteshield Rune kiteshield 1 4; Rare
Dragon med helm Dragon med helm 1 4; Rare
Shield left half Shield left half 1 5; Very rare
Dragon spear Dragon spear 1 5; Very rare

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