Necromancer was a respected professor but when he started running tests with life and death, he was asked to leave his academy. However, Count Vlad offered his castle to Necromancer: He could carry out his experiments there and the Count could show off his influence: he had a Warmaster living in his home.
"Klaatu Barata Nikto" is a famous phrase from the film The Day the Earth Stood Still. The phrase would be said to a robot to not destroy the planet and cause it to resurrect the alien, Klaatu. The phrase is used in the film Army of Darkness where Ash mispronounces the phrase as "Klaatu Verata Nectar".