Kal'gerion demon

Kal'gerion demons are found within the Daemonheim peninsula, in the Kal'gerion resource dungeon, requiring level 90 Dungeoneering to enter. They can be assigned as a Slayer task by Kuradal, to players with at least level 90 Slayer, but this is not required to kill them normally.

Kal'gerion demons drop Kal'gerion battle commendations, of which you need to obtain at least one to unlock the trimmed completionist cape.

Strategy
Kal'gerion demons have high defence and lifepoints. While they list no explicit weakness, magic is the most consistent hitting style. The demons have a special attack, which will do one of two moves randomly. They will only do this special attack once per battle. These attacks can be avoided completely by hiding behind one of the rocks scattered about the room as the demon prepares its attack. If a special attack knocks you below half health, it will not trigger portents of restoration.


 * Drag - The demon drags its target, dealing high damage and healing itself. Players will be dealt up to 1000 damage while the demon will heal for 5062 lifepoints. (15% of their maximum)
 * True power - The demon jumps in the air and smashes the ground, hitting around 1,000 unblockable damage to its target.

There is a third special attack that will also be used by the demon if you hide behind a rock for too long or move too far away. The demons can do this at any time, not only as their special attack; they can thus use it more than once per fight. It is possible for this special attack to override one of the previous two by hiding early.
 * Flame portal - The demon casts a flame portal over its target that repeatedly hits around 500-800 unblockable damage.

100% drop

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Herbs

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Runes

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Armour

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Weapons

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Other

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Trivia

 * Although their long-distance attack has a magic animation, it is classified as a melee attack. BTS 105 has also said that they use magic, but they do not. This may be an oversight from Jagex.
 * Sometimes after the monster is killed its loot will not appear and this is a glitch since they always drop infernal ashes.