A cruel demon, who, according to Johan Weyer, filled the
post of chief executioner to the monarch of Hades. The conception
of him somewhat resembles that of Nemesis. Zoroaster
is said to have called him The Executioner. Others identify
him with the destroying angel. Evil genies were formerly called
alastors. Plutarch says that Cicero, who bore a grudge against
Augustus, conceived the plan of committing suicide on the emperors
hearth, and thus becoming his alastor.
Weyer, Johannes. Witches, Devils, and Doctors in the Renaissance
Johann Weyer, De Praestigiis. Edited by George Mora.
Binghamton, N.Y. Medieval and Renaissance Texts and