|Release date||28 January 2013 (Update)|
|XP per kill||908.8 (and 299.9 experience)|
|Always drops||Infernal ashes|
|Examine text||A potent force of bloodshed and evil.|
|Assigned by||Sumona, Vannaka, Duradel or Lapalok, Kuradal|
Demon bosses are encountered as part of the Demon Flash Mobs Distraction and Diversion. They serve as the main boss of the activity, although only one appears within each mob. It is protected by six imp heralds, four lesser demons and two black demons; the latter two it will devour to recover lost health. Its name and, to some degree, its appearance is random, but the prefix and suffix of its name will affect its abilities.
Attempting to use prayers while fighting the demon causes it to deal extra damage when hitting you.
The boss of a demon flash mob will have a prefix to his name. This prefix determines the attacks the boss will use mainly, or what it is particularly good at.
|General||Accurate melee attacks|
|Executioner||High hitting attacks|
|Castellan||Very high defence|
|Deacon||User of magic|
The boss of a demon flash mob will also have a suffix to his name. This suffix determines what special abilities this boss demon has.
|Blazing||Fire-based damage over time effect (deals magic damage, similar to Combust, but cannot be removed by Freedom)|
|Corrupting||Poison area of effect (everyone within 3 squares of the boss is inflicted with poison that can deal over 1000 damage)|
|Frostborn||Ice area of effect (everyone within 3 squares of the boss is stunned for six seconds)|
|Glorious||Stun (lasts for six seconds at a time)|
|Infernal||Fire area of effect (low damaging variant of Combust)|
|Obscured||Drains stats of nearby players|
|Pestilent||Poison damage over time (extremely powerful poison, dealing from 600-1100 damage)|
|Rending||Bleeding damage over time (low damaging variant of Dismember)|
|Shattering||Melee attacks hit everyone within 3 squares of the boss|
|Terrifying||Binds nearby players and reduces adrenaline gain of all players fighting|
|Zamorak Demons||Zaros Demons||Zarosian meaning|
|Jah'shu||Janio||Janus (Double faced)|
In order to receive a drop, the player must deal at least 500 damage to the demon boss in a single hit; once this condition is met a notification will be given to the player. The player must also stay in combat with the boss until it dies to be eligible for the rewards. If the player gets out of combat by any means, they will lose the ability to get the drop from the demon, and must deal 500 damage in a single hit again to be eligible for a drop.
Fighting a demon boss in the Wilderness will give different drops and a drastically increased drop rate for the demon slayer equipment. Demon slayer equipment will always be included as a secondary drop, similar to clue scrolls and effigies.
Item Quantity Rarity GE Market Price Rune platebody 1 Uncommon 38,075 Rune platelegs 1 Uncommon 37,541 Dragon helm  1 Rare 59,076 Demon slayer circlet 1 Rare 69,765 Demon slayer torso 1 Rare 136,001 Demon slayer skirt 1 Rare 107,483 Demon slayer gloves 1 Rare 115,412 Demon slayer boots 1 Rare 502,644
Item Quantity Rarity GE Market Price Dragon longsword 1 Uncommon 58,264 Rune 2h sword  1 Uncommon 37,329 Demon slayer crossbow 1 Rare 922,594 Off-hand demon slayer crossbow 1 Rare 1,571,238
3 charms are dropped at a time.
Herbs and SeedsEdit
Item Quantity Rarity GE Market Price Grimy irit  14, 30 Uncommon 42,910–91,950 Grimy avantoe  8, 20 Uncommon 37,904–94,760 Grimy lantadyme  5, 10 Uncommon 45,010–90,020 Grimy torstol 3 Uncommon 22,233 Lantadyme seed  2, 3 Uncommon 68,274–102,411 Torstol seed  1 Rare 23,347
Item Quantity Rarity GE Market Price Yew logs 60 Uncommon 25,200 Maple logs 200 Uncommon 6,400 Magic logs  40 Uncommon 43,760
Ores, bars and gemsEdit
Item Quantity Rarity GE Market Price Coal 80 Common 18,640 Mithril ore 40 Uncommon 23,560 Mithril bar 20 Uncommon 35,940 Runite ore  5 Uncommon 56,530 Uncut ruby 10–20 Uncommon 36,010–72,020 Adamant bar  25 Uncommon 79,800 Rune bar  4 Uncommon 56,928
Item Quantity Rarity GE Market Price Coins  20,000, 45,000 Uncommon Not sold Infernal ashes  30, 40, 60 Uncommon 90,360–180,720 Green dragonhide  30 Uncommon 66,030 Red dragonhide  15 Uncommon 56,145 Black dragonhide  10 Uncommon 43,930
- 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 1 Rare Not sold
- ^ The amount of 5 is dropped in the Wilderness.
- ^ a b c d e f g h i j This item is only dropped inside the Wilderness.
- ^ The amount of 30 is dropped in the Wilderness.
- ^ The amount of 20 is dropped in the Wilderness.
- ^ The amount of 10 is dropped in the Wilderness.
- ^ The amount of 3 is dropped in the Wilderness.
- ^ 45,000 is dropped in the Wilderness and 20,000 outside
- ^ The amount of 60 is only dropped in the Wilderness.
- The Demon boss has the most health of any monster in a single health bar.