Combat: The ice ghost can blow a cone of cold once per hour that does 5d4+1 damage and drains heat. Range is 25 feet, diameter is 5 feet. Any being killed by its claws has their soul encased in the nearest chunk of ice. Anyone looking at the ice can see a small version of the victim inside. To revive the person, the ice chunk must be placed in their mouth, then hot wine must be poured on the ice, melting it. Ice ghosts are invisible during the day, cannot use their cone of cold (except during snow storms) but can attack with their claws, all without becoming visible. However, their movement rate of 1 during the day keeps them from being too deadly...unless it is blizzarding, in which case they are quite deadly. They can always be seen clearly in the ethereal plane. Ice ghosts can only be hit by magic or silver weapons. They can be dispelled by finding their corpse and cremating it, then smashing the bones in a blacksmiths forge.
Habitat/Society: The ice ghost haunts the locality of its demise, seldom traveling more than a few miles away. The treasure of other travelers it has slain lay scattered about. The ice ghost ignores most treasure, but occasionally pauses to look at gems.
Ecology: People in colder climes are especially careful to let strangers in out of the cold, fearing they may otherwise become an ice ghost. A single ice ghost can quickly depopulate a village, either killing the inhabitants or causing them to flee.