Abyssal demon

Abyssal demons are located at the top of the Morytania Slayer Tower and the depths of the dark Abyssal Area (NOT the abyss), and is the ultimate goal of most slayers for the Abyssal Whip that it drops. Only players that have attained level 85 Slayer have the ability to fight it for its valuables. Slaying Abyssal demons can be very profitable to players due to the rarity and strength of the whip, though it is a rare drop.

Strengths and weaknesses
As the Abyssal demon is indeed a demon, it is affected by the powers of Silverlight and Darklight. Abyssal demons hit very low considering their level, with a max hit of only 8 damage, which makes it very good for using Guthans or Dharoks, because of the low risk of dying. Abyssal demons also have the unusual ability of teleporting around the room.

They look a lot like shifters who have also been known to teleport during battle.

Drops
100% drop: Ashes

Weapons
 * Abyssal whip (rare)
 * Black sword
 * Black axe
 * Dragon spear (very rare)
 * Rune battleaxe (extremely rare)
 * Rune 2h sword (extremely rare)
 * Rune spear (extremely rare)
 * Steel battleaxe
 * 150 Steel arrows (very rare)
 * 20 Adamant javelins
 * 5 Rune javelin
 * 50 Air runes (common)
 * 7 Blood runes
 * 10 Chaos runes
 * 67 Nature runes (very rare)
 * 3 or 45 Law runes

Armour
 * Dragon medium helmet (very rare)
 * Mithril kiteshield
 * Rune chainbody (uncommon)
 * Rune medium helmet
 * Rune kiteshield (very rare)
 * Rune square shield (very rare)

Other
 * Coins
 * 60 noted pure essence (common)
 * Level 3 Clue Scroll (uncommon)
 * Cosmic talisman
 * Nature talisman
 * Chaos talisman
 * Defence potion (3)
 * Gems
 * 100 Noted silver ore (very rare)
 * Adamantite bar
 * Half key (uncommon)
 * Dragon shield left half (very rare)
 * Abyssal demon head (extremely rare, around 1 in 5000+)
 * Blue Charm
 * Crimson Charm
 * Gold Charm
 * Green Charm
 * Nothing