Salor the Berserk Slaughterer, a famous personage in many dimensions… At least seven years ago, he could be considered one of the highest-tier powerful existences in the Chaos Abyss as well.
He wasn't a Devil Lord. However, his reputation with devils had actually exceeded that of the Devil Lords since the latter rarely appeared. Salor had participated in two previous eternal Holy Wars, and was the commanding general on the bloodiest frontlines. If you wrote down the names of all powerful individuals that he had killed before, the list would probably be even thicker than a phone book.
However, the devils had now greatly weakened as a species. The fragile balance between demons and devils had been shattered. Salor went from being a leading frontline general to nothing more than a vagabond in a single night. It could be said that he had fallen low.