Rusty Locket

If this item is gifted to you, until your attunement with it ends, the gifter will lose all recollection of you.   (You gain temporary hitpoints equal to your total hit dice when you complete a long rest while wearing this amulet. When you complete a long rest, roll a d100. On a 5+hit dice maximum or lower, your hit dice maximum is reduced by 1. They are not restored when you unattune to this item. You can have your hit dice maximum restored through a Greater Restoration spell.) (Maybe)