I'm adding to my homebrew campaign a race of nasty creatures that i am calling Hags. Based loosely on the idea of Hags from the old DnD source material (and particularly upon the character of Ravel Puzzlewell from the computer game Planescape: Torment), i envision these creatures as grotesque mockeries of ancient women, hideous in a variety of ways. They reproduce infrequently (making many of them close kin), live, essentially forever and are deeply alien creatures, fascinated by magic, riddles, human psychology (folk ken) and so on. While clearly utterly evil and very dangerous, they will be very insular, living their lives out in the wilderness, alone and deep in their obsession.
The younger hags will tend towards magical specialities (one is insecure and a seducer of men, heavy on the imaginem and mentem, another obsessed with the written word and heavy on glyphs, runes and languages, etc) while the older hags are more forces of nature, terrifyingly powerful but usually keeping to themselves.
Their role in the campaign is likely to be less as enemies (since they are insular and generally don't bother others) and more as teachers, sages and loremasters. Any deal with them would be bargained strongly and while they would initiate several mystery virtues, their initiations are brutal and horrifc, enough to make their use as sages ony for the desperate and for teachers only to the truly interested. One would not consult a hag lightly.
I've written up some fluff for a young seducer, one obssessed with writing, another with metalwork, toys and complex mechanical devices, another with puzzles and riddles and one with death and decay.
I've previously had some great ideas from this forum when discussing my homebrew stuff. Anyone got any god ideas for my hags.