Onslaught Darkweaver

A group of Darkweavers performing a ritual on a Captured Death's Rise Spy.

Onslaught Darkweavers are Scarlet Onslaught warlocks located in the Hidden Hollow in Icecrown. Some roam the cave in pairs, accompanied by Imp Minions and Succubus Minions, while others stand in groups of three and perform fel rituals on Captured Death's Rise Spies.

Abilities

Demon Armor — Protects the caster, increasing armor, Shadow resistance and health regeneration for 30 min.
Shadow Bolt — Hurls a bolt of dark magic at an enemy, inflicting Shadow damage.
Summon Imp — Summons an Imp to accompany the caster until dismissed.
Summon Succubus — Summons 1 Succubus to accompany the caster until dismissed.

The subject of this section was removed from World of Warcraft in patch 4.0.3a but is present in Wrath of the Lich King Classic.

Metamorphosis — You transform into into^[sic] a Demon, increasing your armor by 360% and reducing the duration of stun and snare effects on you by 50%. While in Demon Form, you cannot cast spells, but you gain unique demon abilities.