Black demon

Black demons are large monsters that inhabit a few dungeons across RuneScape. They use melee attacks that can hit up to 16 on a player, or up to 20 on a familiar. They are much stronger than their Greater demon cousins and are often assigned by Sumona, Duradel and Kuradal as Slayer tasks. It should be noted that Black demons drop low amounts of coins extremely often, making killing them for any other reason than a Slayer assignment not worth the trouble most of the time. Many players permanently cancel Black demon tasks using Slayer reward points, however they can be killed effectively and are therefore left unblocked by some who wish to block other monsters.

Black demons give about 628 xp per kill so use this xp wisely.(157hp x 4 per damage = 628) If your ranging level is low or you dont want to lose ammo or you dont want to use magic you should use a halberd. (swipe is a recommended style for this monster.)

Locations
Black demons inhabit the following locations:
 * The deeper half of Taverley Dungeon (requires dusty key or level 70 Agility)
 * Underneath Edgeville, in the Wilderness section of the dungeon.
 * The Chaos Tunnels. These Black demons have a notably higher drop rate of charms.
 * Brimhaven Dungeon, right before the Iron and Steel dragons, and with the Bronze dragons.

In each location there is at least one safespot from which the demons can be fought safely with Ranged, Magic, or a halberd.

Strategy
Despite their combat level, Black demons have fairly low defence. However, they are usually one of the most dangerous monsters in the dungeons they inhabit because of their accuracy and high max hit.

Melee
Meleeing Black demons is the fastest, most effective method of killing them and is the advised method for players who have the appropriate equipment and stats. Due to their accuracy and strength, most players choose to use protection prayers to avoid damage; this is more costly than simply using food but is a lot less risky should a connection loss occur. Meleeing Black demons without prayer is viable, but good armour, food, and a healing familiar are imperative. A Defence level of 85+ is advised for slaying black demons efficiently.

Use of a halberd is much slower than conventional melee weapons, but it is much cheaper. Taverley Dungeon is the recommended location for using halberds, but the Chaos Tunnels and Edgeville Dungeon can be used as well.

Ranged
Ranging Black demons is nearly as effective as meleeing and is generally less risky. Although all areas that Black demons inhabit contain safespots, Taverley Dungeon is generally regarded as the best of the four. The Chaos Tunnels are also a safe place to range them; the Black demons there drop charms more often than those in other locations, so players wishing to train Summoning are recommended to range them in the Tunnels.

Cannoning
Cannons are fairly effective against Black demons, so they are a good option to all who can afford them. However, cannons cannot be used in the Chaos Tunnels and are subject to hitting other monsters, such as Wild Dogs, in the Brimhaven Dungeon.

Edgeville Dungeon
This is the best place but can be crowded at times. It is not recommended for players below 80 combat, unless they are willing to be attacked by revenants. It is advised to have a brass key, because the ladder in the area of the Black demons leads to the wilderness, which puts the player at risk of being attacked by MULTIPLE revenants.

Brimhaven dungeon
The second best place overall, especially for players above level 60 combat - getting in and out is no threat and fighting the Black demons is like usual. However, this area is far from a bank and is full of aggressive Wild dogs, which may attack the player and prevent him or her from killing Black demons until it is killed.

Taverley Dungeon
Although this is a good spot for players who have high combat levels or are willing to take risks, those below combat level 85 are NOT encouraged to train here as it is very dangerous to navigate the dungeon. To minimize the danger, players should bring good food and a one-click teleport, since it is dangerous to exit by walking. This is the third best location.

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100% drops

 * Ashes

Runes and talismans

 * 50 or 75 air runes
 * 37 or 40 fire runes
 * 10 chaos runes
 * 45 death runes
 * 7 blood runes
 * 3 or 45 law runes
 * 67 Nature runes
 * Chaos talisman

Armour

 * Dragon med helm (very rare)
 * Mithril kiteshield (rare)
 * Rune kiteshield (rare)
 * Rune med helm (uncommon)
 * Rune platelegs (rare)
 * Rune chainbody (rare)
 * Rune sq shield (rare)
 * Shield left half (very rare)
 * Rune platebody (very rare)

Weapons

 * Black hatchet (common)
 * Black sword (common)
 * Dragon spear (very rare)
 * Rune spear (very rare)
 * Rune 2h sword (rare)
 * Rune battleaxe (rare)
 * Steel battleaxe (common)

Ammunition

 * 1-200 adamant javelins (rare)
 * 135-345 bronze arrows
 * 5 or 10 rune Javelins
 * 12, 42, or 64 rune arrows
 * 150 steel arrows

Ores and bars

 * Adamant bar
 * 20 Noted Coal
 * Runite bar (rare)
 * 100 Noted Silver ore

Herbs

 * Herbs (excluding Spirit weed, Wergali, Toadflax and Snapdragon)

Other

 * Nothing
 * 30, 44, 132, 220, 460 (very common) or 3,000 coins (rare)
 * Defence potion, (1) or (3)
 * All gems (except onyx)
 * Tooth half of a key
 * Loop half of a key
 * 1 or 2 Cooked lobsters
 * 10 Thread

Trivia

 * Most Black demons were level 156 in RuneScape Classic. The boss of the Grand Tree quest was level 172. It was the strongest quest monster until the release of the Legends Quest.
 * The spelling of the regular demon is Black demon with lowercase second word. However, for The Grand Tree quest, it used to be spelled Black Demon with 2 uppercase words. This has now been fixed.
 * Slayer Masters say that the Black demon is the strongest demon. This is, however, uncertain; the Jungle Demon, Tormented demons, K'ril Tsutsaroth and Nezikchened all are higher levelled and have higher max hits. But may be true as is seems Nezikchened is classified as an elder demon. Similarly, K'ril Tsutsaroth is an elder demon, though Slayer masters say he is a Lesser Demon.