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Lycanthropes are mortals who have been affected by Lycanthropy, a condition that transforms them into a large hybrid of humanoid and animal. Lycanthropy was created by the Daedric PrinceHircine, and has remained a controversial subject in Tamriel. Some lycanthropes view the condition as a gift from Hircine, while others see it as a curse that they wish to rid themselves of. There are eight recorded variations of lycanthropes on Tamriel.
The Werebear is believed to exist in Skyrim, supposedly as the most common type of lycanthrope in the province, although they also appear on the island of Solstheim. This could potentially be due to the fact that Solstheim is in close proximity to Skyrim, and a population of werebears could have migrated there.
The Werewolf is the only lycanthrope known to be found everywhere in Tamriel. They are confirmed to have a connection with Hircine, and are often described as his hounds. Werewolves are arguably the most well-known lycanthrope on Tamriel.
The Circle, an elite group of warriors within The Companions, is comprised of werewolves. Lycanthropy is passed down to new members through a blood ritual upon their admittance into the Circle.