Monster skill

Monster skills are skills used by monsters in Guild Wars that are unique to those monsters.

Monster skills cannot be learned (through Skill Trainers) or captured (through a signet) by players in the game. Also, Mesmer can't "steal" them with spell theft and mimicking skills like Arcane Thievery.

Unique Skills
In addition to skills specific to monsters, some NPCs who accompany players as allies in Guild Wars have unique skills that cannot be learned. These are:
 * Chains of Enslavement
 * Chimera of Intensity
 * "Killroy Stonekin"