The Hubris Of Humanoids

You attempt to delete another creature's memories. One creature that you can see must make a Wisdom saving throw. If you are fighting the creature, it has advantage on the saving throw. On a failed save, the target loses all of it’s memories. On a successful save the the spell affects you instead. You loose all your memories.

With no memory sometimes creature can forget natural inclinations, alignment, or beliefs.

A remove curse or greater restoration spell cast on the target restores the creature's true memory.

This spell can only be cast by humanoids.