Black demon

Black demons are large monsters that inhabit a few dungeons across RuneScape. They are combat level 172, jet-black, and have a melee-based attack that can hit up to 16.

As demons, they are affected by the magical abilities of Silverlight and Darklight.

Tactics
Demons have no ranged combat ability, so the use of a safe spot for Ranged, Magic, or a halberd prevents them from damaging you.

Black demons have a high defence so Melee and Ranged combat are less effective than Magic attacks. Furthermore their very high Defence makes the Dwarf multicannon very ineffective against them.

If you plan to use melee combat against them, using items to enhance your Attack level would be highly useful. These include Rune Defender, Black Mask (only useful if Black Demons are your current Slayer assignment), and Super attack potions. Higher level players may find using the Guthan set effective as Black demons have a large number of hitpoints, and they may go without food or prayer for long periods of time.

Since Black Demons only possess melee attacks, using the Prayer Protect from Melee is highly effective for eliminating the damage sustained from their attacks.

Locations
Black Demons inhabit the following locations:
 * The deeper half of Taverley Dungeon.
 * Underneath Edgeville, in the Wilderness section of the dungeon.
 * Brimhaven Dungeon
 * Chaos Tunnels

100% drops

 * Ashes

Runes and talismans

 * 50 or 75 Air runes
 * 7 Blood runes
 * 10 Chaos runes
 * 45 Death runes
 * 37 or 40 Fire runes
 * 3 or 45 Law runes
 * Nature runes
 * Chaos talisman

Armours and weapons

 * Black axe
 * Black sword
 * Dragon dagger
 * Dragon medium helmet (extremely rare)
 * Dragon spear
 * Mithril kiteshield
 * Rune kiteshield
 * Rune longsword
 * Rune medium helmet
 * Rune platelegs
 * Rune spear
 * Rune 2h sword
 * Rune battleaxe
 * Rune chainbody
 * Steel battleaxe
 * Rune sq shield
 * Shield left half (dragon square)

Ammunition

 * 1-200 Adamant javelins
 * 300 Bronze arrows
 * 5 or 10 Rune Javelins
 * 12 to 47 Rune arrows
 * 150 Steel arrows

Ores and bars

 * Adamant bar
 * 20 Noted Coal
 * Rune bar
 * Noted Silver Ore

Others

 * 30, 132 or 3,000 Coins
 * Defence potion (1) or Defence Potion (3)
 * All Gems (except Onyx)
 * Half of a key
 * Grimy Herbs
 * 1 or 2 Cooked lobsters
 * Gold charm, Green charm, Blue charm, Crimson charm (Charm drops are uncommon)

Unique Black Demons
There is one unique black demon that appears during The Grand Tree quest. The demon is more difficult than the usual Black Demons. But it can be ranged and maged also making him easier to kill.

There is also a Black Demon named Nezikchened in the Legends Quest.