Bisclavret

No mythic origin is given in the lai; Marie de France presents Bisclavret as a baron who (she says) 'vanishes every week for three full days' into wolf‑form. Marie claims to have translated the story from Breton performance tradition, but the narrative itself does not supply a cause or ancestral origin for the condition. The plot centers on the baron’s secret practice, the discovery of his hidden clothing by his wife (who conspires with another knight), the theft of those garments which prevents his reversion, and the eventual royal inquiry that leads to the clothes’ recovery and the baron’s restoration while the wife and her new husband are exiled.

In human guise Bisclavret is introduced as a baron and a well‑loved knight of the king. In his wolf form he appears as a wolf whose behavior in the poem is marked by nobility and gentleness rather than blind savagery: when cornered during a royal hunt he seeks the king's mercy by taking the king's stirrup and kissing his foot and leg. The narrative also records a violent, targeted episode in which the wolf tears off his wife's nose; the lai later remarks that some of her female descendants were born without noses, linking that mutilation to genealogical consequence.

Textual evidence attributes cyclical physical shape‑change (a weekly disappearance for three days) and retained memory, social recognition, and reason in wolf form: Bisclavret recognizes and submits to his lord, behaves submissively toward the king, and directs aggressive acts at specific wrongdoers (the wife and her new husband). The tale emphasizes a material dependence for reversion: the transformed man must hide his clothing in a secure place to be able to return to human form, and if those garments are withheld he cannot change back. No wider supernatural powers (speech, command over elements, or cosmic effects) are described in the supplied sources.