Doomstalker(1985)

Glen Cook

The Grauken Wakes...
It was the dormant, loathsome instinct possessed by every beast of Ponath. An innocent pup of the Degnan Packstead, Marika thought it was just a tale to frighten the young. Then the Grauken-possessed, cannibalistic nomads swept down from the far north -- and the winter of death began.

Marika's pack now has to fight for its life -- even if it means calling upon the treacherous witchlike Silth who can slay by mind alone. But young Marika has powers, too... enormous, untamed mental energies. Can Marika be a weapon against their foes? Or will she become something far greater than the Silth, something fearfully whispered of only in legends... Doomstalker.