The are immensely strong also in comparesion to Humans, being twice as strong on average. The Winter Werewolf disease exists primarily in the far north where Winter Wolves are found. So rare is this disease that only a few people have ever seen it. Like other lycanthropes they can take their base form, animal form and a bipedal hybrid of the the two. This template is placed over your current character, the stats and abilities are added on to your existing skills, feats, or ability scores.
Character now has evil tendancies.
If you are a medium sized creature you are classed as large in animal or hybrid forms, if you are already large you stay large.