
Sister Aelfwyn (died 874) was an East Anglian Roman Catholic warrior-nun and self-professed "saint" who distinguished herself as the "Hammer of the Heathens" during the Viking invasions of England of the late 9th century AD. At the ruined church at Edmund's Hope, she made "blood offerings" of dead Danish warriors, killing twelve of the Danes and writing a letter to God from his "most devoted apostle". She was later accosted by the Norwegian Viking warrior Eivor, who came across the massacre site, and Aelfwyn tried to kill him before he mortally wounded her. She then claimed to have received a vision of "the Crow-Eyed Devil" from God, who had sent out his angels to kill Eivor, and she then collapsed and bled out.