Dark Sun: The Scorched World of Athas
Wise in the ways of dark magic and curses, hags are cruel and dangerous fey. They haunt the lonely places of the Lands Within the Wind but are unknown on the world of Athas. Hags prefer to bully weaker creatures and foment wicked schemes against mortals unfortunate to cross their paths.
Hags often know dark rituals that allows them to scry distant places, see into the future, manipulate the weather, or place curses on those who anger them. They gather in small groups called covens, thereby combining their ritual knowledge.
A bog hag rends its victims to pieces with its claws in a series of hit-and-run attacks, using its speed to move past enemies.