Demon boss

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, which it devours to heal itself if you take too long to defeat them. Its name and, to some degree, its appearance is random, but the prefix and suffix of its name will affect its abilities.

Prefixes
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.

Suffixes
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. Frostborn variants are extremely dangerous to all players.

Main names
A boss demon in a flash mob will have a main name, which can either be aligned to Zaros or Zamorak. This name doesn't have any further use.

Drops
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 leaves or dies, the hit of 500 damage needs to be done again to still get a drop. The drop will appear under the boss.

Fighting a flash mob in the Wilderness gives you a greater chance of getting a demon slayer gear drop, and other drops will be worth around three times as much as other spawn locations.

Demon slayer gear is dropped alongside the drop it was going to give you. For example, a player that receives a Off-hand demon slayer crossbow can also get any of the common drops it gives.

100% Drop

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Armour

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Weapons

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Charms
3 charms are dropped at a time. Unknown which charm seems to be the most dominiant.

Herbs and Seeds

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Logs

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Ores, bars and gems

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Miscellaneous

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