Total Erasure

You unleash powerful memory magic into the world.  All creatures within the same plane forget a ten-minute juncture of the past 24 hours, from the time you began casting the spell.  This spell has no effect on fiends, fey, aberrations, constructs, or creatures within dead magic fields.

Roll a d20.  On a 1, the spell fails, and the caster is struck with amnesia.  They retain all levels and class features, but all relationships, tasks, attachments, and memories are forgotten.  There is a 1 in 12 chance that the caster will regain all of their memories over a few years, and a 2 in 12 chance that any will be regained over the caster's lifetime.

On a 2, the spell succeeds, but only partially, and only temporarily erases memory.  Over the course of 1d8 months, all affected creatures will slowly regain their memories.

The spell can be used to target a ten-minute stretch of time greater than 24 hours in the past if the stretch that the caster wishes to erase is directly adjacent to another stretch which Total Erasure has already affected.  This can also work to solidify forgetfulness in the event the spell partially fails.

The caster remains aware of whatever occurred during any affected stretch from a casting perpetrated by them.