Curse of Memory Vault

You attempt to reshape another creature’s memories. One creature that you can see within range makes a Wisdom saving throw. If you are fighting the creature, it has Advantage on the save. On a failed save, the target has the charmed condition for the duration. While Charmed in this way, the target also has the incapacitated condition and is unaware of its surroundings, though it can hear you. If it takes any damage or is targeted by another spell, this spell ends, and no memories are modified.

While this charm lasts, you can remove the target’s memory of up to a year at a time. You do not have to provide a description for the missing time to complete the spell, rather may choose to leave it blank.

The target must be able to understand your language for the memories to be locked onto. If the spell ends before you finish describing the modified memories, the creature’s memory isn’t altered. Otherwise, the memory modification takes hold when the spell ends. The curse does not remove the memories entirely, but hides them in a dark and quiet place in the target's mind that cannot be accessed without a cure.

A Remove Curse or Greater Restoration Spell cast on the target restores the creature’s true memory, but depending on the scale of the curse, the target's memory may take 1d12 weeks to fully return. If the spell succeeds in restoring the creatures memory, it immediately takes 1d8 psychic, plus an additional 1d4 per level used above 5th.

At Higher Levels. If you cast this spell using a spell slot of 6th level or higher, you can alter 2 years of the target's memories (6th level), 3 years (7th level), 4 years (8th level), 5 years (9th level).

Once a spell is used to unlock the vault, it may take weeks for the target to regain their full memories. Repeated use of this spell can make it harder for the target to recall the lost time.