The first night
Lycanthrope starts as a good Outcast. It stays in that state if you reveal it within the first four cards. If it is still hidden when the first night falls, it becomes an evil Werewolf and begins to lie.
The next night
Four more reveals can trigger the next night. The UI overhaul update sets Werewolf damage at 1 HP and says a dead Werewolf no longer deals damage. If you lose 1 HP after a night, check whether a Lycanthrope was left hidden at the first night and whether the Werewolf is still alive.
Clues gathered before the transformation describe the village at the time they were given. Recheck clues that depend on where the evil cards are after a transformation.