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RuneScape 3 icon

Release date 20 February 2006 (Update)
Members? Yes
Always drops Ashes
A ball of electrical energy.

An angry electrical shock!

Combat info
Combat 55
Hit points 51
Aggressive No
Poisonous No
Max hit Melee: 6

Ranged: 13+

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 RangedStrength-icon Attack-icon Poison hitsplat Venom hitsplat
+0 +0 +30 No No
Attack speed
Monster attack speed 8

Warning: Users with photosensitive epilepsy should not attempt to go in the portal where these monsters reside, due to the flashing lights and strobes inside. Professor Oddenstein will mention this warning prior to entering the killerwatt plane.

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.

Note: 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.

Since killerwatts are a bit hard to kill, players often skip this task due to the killerwatt's attack since their attack is much dangerous.

Drops Edit

100% drop Edit

Item Quantity Rarity GE market price
Ashes Ashes 1 Always 35

Weapons/Armour Edit

Item Quantity Rarity GE market price
Staff of fire Staff of fire 1 Uncommon 1,006
Staff of air Staff of air 1 Uncommon 1,865
Fire battlestaff Fire battlestaff 1 Uncommon 9,324
Air battlestaff Air battlestaff 1 Uncommon 9,141
Mystic fire staff Mystic fire staff 1 Uncommon 27,711


Item Quantity Rarity GE market price
Grimy guam leaf Grimy guam leaf 1 Common 20
Grimy marrentill Grimy marrentill 1 Common 16
Grimy tarromin Grimy tarromin 1 Common 73
Grimy harralander Grimy harralander 1 Common 598
Grimy ranarr weed Grimy ranarr weed 1 Uncommon 9,958
Grimy irit leaf Grimy irit leaf 1 Uncommon 1,745
Grimy avantoe Grimy avantoe 1 Uncommon 2,865
Grimy kwuarm Grimy kwuarm 1 Uncommon 3,930
Grimy cadantine Grimy cadantine 1 Uncommon 3,077
Grimy lantadyme Grimy lantadyme 1 Rare 1,813
Grimy dwarf weed Grimy dwarf weed 1 Rare 2,303

Runes Edit

Item Quantity Rarity GE market price
Air rune Air rune 5; 17 Common 25–85
Fire rune Fire rune 18; 45 Common 90–225
Nature rune Nature rune 8; 37 Uncommon 2,336–10,804
Chaos rune Chaos rune 4 Uncommon 408
Death rune Death rune 2 Uncommon 532
Steam rune Steam rune 2 Uncommon 128

Other Edit

Item Quantity Rarity GE market price
Coins 100 Coins 11–21; 44; 127; 156; 200 Common Not sold
Cannonball Cannonball 3 Uncommon 852
Fire orb Fire orb 2 Uncommon 2,474
Soda ash Soda ash 4 Uncommon 280

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 2,186
Loop half of key Loop half of key 1 Common 13,704
Tooth half of key Tooth half of key 1 Common 25,768
Uncut emerald Uncut emerald 1 Uncommon 2,051
Uncut ruby Uncut ruby 1 Uncommon 2,060
Nature talisman Nature talisman 1 Uncommon 642
Chaos talisman Chaos talisman 1 Uncommon 426
Nature rune Nature rune 67 Uncommon 19,564
Runite bar Runite bar 1 Uncommon 13,680
Rune spear Rune spear 1 Rare 12,471
Rune battleaxe Rune battleaxe 1 Rare 26,687
Rune 2h sword Rune 2h sword 1 Rare 41,595
Uncut diamond Uncut diamond 1 Rare 4,245
Rune javelin Rune javelin 5 Rare 740
Silver ore Silver ore 100 (noted) Rare 11,800
Adamant javelin Adamant javelin 20 Rare 680
Rune sq shield Rune sq shield 1 Rare 24,526
Steel arrow 5 Steel arrow 150 Rare 6,000
Rune arrow 5 Rune arrow 42 Rare 7,182
Law rune Law rune 45 Rare 12,555
Death rune Death rune 45 Rare 11,970
Dragonstone Dragonstone 1 Rare 28,310
Rune kiteshield Rune kiteshield 1 Rare 35,522
Dragon med helm Dragon med helm 1 Rare 62,683
Shield left half Shield left half 1 Very rare 81,839
Dragon spear Dragon spear 1 Very rare 88,625

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