Total mindwipe

You spend 5 hours magically fixated on a creature that is unconscious and set about completely wiping the memory of it creature, leaving them with total amnesia if the ritual is ran for the full 5 hours or partial memory loss if the ritual is only ran for 2 hours. While the creature is unconscious, you can plant new memories into the creatures mind. You must speak to the creature to describe how its memories are affected, and it must be able to understand your language for the modified memories to take root. Its mind fills in any gaps in the details of your description. If the ritual ends before you have finished describing the modified memories, the creature's memory isn't altered. Otherwise, the new memories take hold when the ritual ends.

Have the creature make a Wisdom saving throw against the casters spell DC. On a fail, the creature will forget their name and memories of any person or event they knew. They retain any basic knowledge required to live (breathing, sleeping, walking) as well as their some of their own abilities. They also retain their personality, although all of it context removed. The target also becomes indifferent toward every creature, although this is only their initial attitude and they quickly adjust.

A Remove Curse or Greater Restoration spell cast on the target restores the creature's true memory.