Arden's Delayed Amnesia

You  touch a creature, attempting to impart amnesia. The target must make an Intelligence saving throw (Dc 10 +spell level). On a fail, the target forgets everything and their alignment become true neutral. The creature retains a knowledge of basic principles and Common. It can cast spells and use items but unless the item is basic or if they are told it's purpose or that they can cast that spell. After one hour, the target regains its memories and forgets what happened during the hour.

The spell can also be ended by greater restoration, heal, or wish.