Wolvins were creatures that resemble earthen wolves. They were notorious for being wicked.
The Seven Sleepers, ancient menaces were of the first, if not the first wolvins. They were gifted by the Wyrm Lord with the power of shape shift. They were strong, powerful and brutal.
Wolvins inhabited the Blackwood and ran wild in it. They stayed a respectful distance from the Sepulchre of the Seven Sleepers, however.