Spine of the World
The second main villain of the story
“Levin” first appeared to the Party when they were inflitrating a cult of Vecna. He pretended to be their ally in order to gain access to the cult and then betrayed them after killing the cult’s leader. He then disappeared only to reappear and kindly forced the Party on their quest to collect elemental orbs in order to stop a black sphere from annihilating Neverwinter.
Levin seems to have gained the left arm and left eye of Vecna and these relics have greatly amplified his power. His power is further amplified by his arsenal of magic items, potions and poisons gained through his research and experiments as an artificer and an alchemist.