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RuneScape 3 icon

Release date 20 February 2006 (Update)
Members? Yes
Always drops Ashes
A ball of electrical energy.
Combat info
Combat 55
Hit points 51
Aggressive No
Poisonous No
Max hit 6
Weakness Melee
Attack Styles
Melee, Magical Ranged
Slayer-icon Slayer info
Slayer level 37
Slayer XP 51
Category Killerwatt
Assigned by
Mazchna chatheadVannaka chathead
Combat-icon Combat stats
Attack-icon Strength-icon Defence-icon Ranged-icon Magic-icon
50 50 40 67 67
Attack-icon Aggressive stats
White dagger White scimitar White warhammer Magic-icon Ranged-icon
+0 +0 +0 +0 +0
Defence-icon Defensive stats
White dagger White scimitar White warhammer Magic-icon Ranged-icon
+10 +10 +10 +20 +20
Other bonuses Immunities
Strength-icon Attack-icon Poison hitsplat Venom hitsplat
+0 +30 No No
Attack speed
Monster attack speed 8
Killerwatt icon

Killerwatts are Slayer monsters located through a portal on the top floor of Draynor Manor that require level 37 Slayer to kill as well as completing Ernest the Chicken. 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 GE market price
Ashes Ashes 1 Always 63

Weapons/Armour Edit

Item Quantity Rarity GE market price
Staff of fire Staff of fire 1 Uncommon 892
Staff of air Staff of air 1 Uncommon 1,885
Fire battlestaff Fire battlestaff 1 Uncommon 9,414
Air battlestaff Air battlestaff 1 Uncommon 9,168
Mystic fire staff Mystic fire staff 1 Uncommon 28,011


Item Quantity Rarity GE market price
Guam leaf Guam leaf 1 Common 18
Marrentill Marrentill 1 Common 15
Tarromin Tarromin 1 Common 73
Harralander Harralander 1 Common 782
Ranarr weed Ranarr weed 1 Uncommon 7,939
Irit leaf Irit leaf 1 Uncommon 1,518
Avantoe Avantoe 1 Uncommon 3,319
Kwuarm Kwuarm 1 Uncommon 4,644
Cadantine Cadantine 1 Uncommon 2,819
Lantadyme Lantadyme 1 Rare 1,651
Dwarf weed Dwarf weed 1 Rare 2,553

Runes Edit

Item Quantity Rarity GE market price
Air rune Air rune 5; 17 Common 30–102
Fire rune Fire rune 18; 45 Common 108–270 
Nature rune Nature rune 8; 37 Uncommon 2,040–9,435 
Chaos rune Chaos rune 4 Uncommon 412
Death rune Death rune 2 Uncommon 542
Steam rune Steam rune 2 Uncommon 126 

Other Edit

Item Quantity Rarity GE market price
Coins 100 Coins 11–21; 44; 127; 156; 200 Common Not sold
Cannonball Cannonball 3 Uncommon 738
Fire orb Fire orb 2 Uncommon 3,772
Soda ash Soda ash 4 Uncommon 284

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 GE market price
Coins 1000 Coins 3,000 Common Not sold
Uncut sapphire Uncut sapphire 1 Common 1,505
Loop half of key Loop half of key 1 Common 8,264
Tooth half of key Tooth half of key 1 Common 27,584
Uncut emerald Uncut emerald 1 Uncommon 1,783
Uncut ruby Uncut ruby 1 Uncommon 1,794
Nature talisman Nature talisman 1 Uncommon 1,015
Chaos talisman Chaos talisman 1 Uncommon 675
Nature rune Nature rune 67 Uncommon 17,085
Runite bar Runite bar 1 Uncommon 14,161
Rune spear Rune spear 1 Rare 12,185
Rune battleaxe Rune battleaxe 1 Rare 27,079
Rune 2h sword Rune 2h sword 1 Rare 42,871
Uncut diamond Uncut diamond 1 Rare 3,871
Rune javelin Rune javelin 5 Rare 1,005
Silver ore Silver ore 100 (noted) Rare 14,500
Adamant javelin Adamant javelin 20 Rare 1,000
Rune sq shield Rune sq shield 1 Rare 24,555
Steel arrow 5 Steel arrow 150 Rare 6,900
Rune arrow 5 Rune arrow 42 Rare 7,182
Law rune Law rune 45 Rare 10,395
Death rune Death rune 45 Rare 12,195
Dragonstone Dragonstone 1 Rare 27,668
Rune kiteshield Rune kiteshield 1 Rare 36,247
Dragon med helm Dragon med helm 1 Rare 62,863
Shield left half Shield left half 1 Very rare 73,803
Dragon spear Dragon spear 1 Very rare 93,027

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