Frostfell ghosts are the remains of creatures killed in the coldest environs. They cling to un-life at the sight of their demise, sometimes warning travelers, other times tricking them, and other times simply attacking them outright.
In addition to the abilities common to all ghosts, frostfell ghosts have been known to employ a few unique tricks.
Frostfell ghosts radiate deadly cold, and some can form this into a blast to sap the warmth from others. Many frostfell ghosts are immune to cold, and no longer feel it.
The etheral radiance of some frostfell ghosts comes from coldfire -- a vicious substance whose damage cannot be healed as long as the victim remains chilled, and that may infect them with a disease that eats away at their body from the inside.
Some frostfell ghosts are epsecially adept at deflecting magical attacks, magic sliding off them like water over ice.