alastor


a·las·tor

also A·las·tor A0176500 (ə-lăs′tər, -tôr′)n. An avenging deity or spirit, the masculine personification of Nemesis, frequently evoked in Greek tragedy.
[Greek alastōr, from alastos, unforgettable : a-, not; see a-1 + lanthanein, lath-, to escape notice.]

alastor

(əˈlæstɔː) nan avenging spirit or demon