Hussar
Legend
Looking at the postcards that were posted from Gen Con, Demogorgon causes the slightest tension to inspire homicidal rage. Mix that with a drow city, which is a pretty tense place to begin with, and, depending on the range of the effect, Demogorgon wouldn't have to do much of anything to destroy the city. He just walks the streets and everyone starts killing each other.
Which sounds just about right for the manifestation of a demon in a city. Fantastic idea.
Which sounds just about right for the manifestation of a demon in a city. Fantastic idea.