Amnesia

You attempt to seal away the memories of a creature, assaulting its mind with insidious magic. When you do so, a creature of your choice in range must make an Intelligence saving throw; on a failed saving throw, the creature loses all memory of their life. 

The creature retains its alignment, class features, spells, proficiencies, and languages, though it cannot recall where it learned them.

This spell can only be ended by the heal or wish spell.