Template:RSW
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 up to 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. 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
100% drop
Item Quantity Rarity GE market price 
Ashes 1 Always 72
Weapons/Armour
Item Quantity Rarity GE market price
Staff of fire 1 Uncommon 1,460
Staff of air 1 Uncommon 1,620
Fire battlestaff 1 Uncommon 8,982
Air battlestaff 1 Uncommon 8,948
Mystic fire staff 1 Uncommon 25,159
Herbs
Template:HerbsDropped
Item Quantity Rarity GE market price
Guam leaf 1 Common 26
Marrentill 1 Common 24
Tarromin 1 Common 153
Harralander 1 Common 706
Ranarr weed 1 Uncommon 7,682
Irit leaf 1 Uncommon 789
Avantoe 1 Uncommon 1,848
Kwuarm 1 Uncommon 1,195
Cadantine 1 Uncommon 1,339
Lantadyme 1 Rare 1,419
Dwarf weed 1 Rare 427
Runes
Item Quantity Rarity GE market price
Air rune 5; 17 Common 25–85
Fire rune 18; 45 Common 90–225
Nature rune 8; 37 Uncommon 1,736–8,029
Chaos rune 4 Uncommon 356
Death rune 2 Uncommon 406
Steam rune 2 Uncommon 136
Other
Item Quantity Rarity GE market price
Coins 11–21; 44; 127; 156; 200 Common Error
Cannonball 3 Uncommon 516
Fire orb 2 Uncommon 2,458
Soda ash 4 Uncommon 260
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 3,000 Common Not sold
Loop half of key 1 Common 10,307
Tooth half of key 1 Common 10,840
Chaos talisman 1 Common 505
Uncut sapphire 1 Common 455
Uncut emerald 1 Uncommon 679
Uncut ruby 1 Uncommon 1,249
Nature talisman 1 Uncommon 744
Steel arrow 150 Uncommon 4,800
Rune arrow 42 Uncommon 2,940
Rune javelin 5 Uncommon 875
Adamant javelin 20 Uncommon 1,220
Runite bar 1 Uncommon 12,368
Nature rune 67 Uncommon 14,539
Law rune 45 Uncommon 7,470
Death rune 45 Uncommon 9,135
Rune battleaxe 1 Uncommon 24,487
Rune 2h sword 1 Uncommon 37,758
Rune sq shield 1 Uncommon 22,459
Silver ore 100 (noted) Uncommon 7,000
Dragonstone 1 Uncommon 11,932
Uncut diamond 1 Rare 2,627
Dragon med helm 1 Rare 58,488
Rune kiteshield 1 Rare 32,015
Rune spear 1 Rare 11,933
Shield left half 1 Rare 65,697
Dragon spear 1 Rare 37,226
