Overcome with curiosity and eager to prove his theory correct, Pyrus performed a mental exercise which allowed him to "see" magical auras. Sure enough, the room was shrouded in Necromantic energy. He was certain they would find undead up there, lingering just out of sight from the grate. Furthermore, he suspected that since he had killed so many men in the room by freezing them to death, that the theme might very well continue in the raised creature's unlife. (A powerful and experienced Necromancer could, in theory, take advantage of a being's type of death when creating undead from a corpse.)