When in battle, will o'mists attack with a burst of electricity. Will o'mists can strike in this manner every third round, causing 2-16 (2d8) points of damage to anyone within 30' of the attacking creature. A successful saving throw vs. spell reduces this damage by half. Victims wearing metal armor have a +4 bonus to their saving throws due to the exceptional conductivity of metal and its natural grounding effects.
a will o’ mist is able to unerringly navigate the swirling vapors of Ravenloft's borders.
As with other variants of the will o’ wisp, it appears that will o'mists feed off of the electrical energy generated by human and demihuman brains. It is thought that the will o'mist in particular can only leech such energy from people when they are actually crossing the misty borders of Ravenloft. This may account for reports that some people claim to have been struck by a wave of disorientation and nausea upon stumbling out of the mists.
Since will o'mists are incapable of straying more than a few yards from the mists themselves, they must lure humans and demlhumans into the mists in order to feed It is probable that the specific energy on which will o’ mists feed Is the fear and disorlentatlon felt by many travelers In the mists. It has even been theorized that such creatures are part of a bizarre network that funnels llvlng energy into the Land, helping it to maintain itself and draw more unwitting souls across its dark borders.