The necromancer did not resort to aggression unless agreements could not be made.
Circa 1491 DR, Kost traveled to Old Owl Well to seek out ancient Netherese magic and anything associated with it. He set up camp and his writing desk, and planned to stay here for some time. The necromancer set up camp and summoned twelve zombies to protect him during his search. He came across a Netherese ring of protection, and other items.