Aeorian Sleep Transference Device

The device has 7 charges,  signified by 7 tiny chrystals that light up, when charged. Placing it under the user's head (or pillow) will allow them to gain the benefits of a long rest from only 4 hours of sleep, instead of the regular 8 hours of rest.

Regaining Charges. To regain one charge, the item must be fuelled by the voluntary sleep of a friendly humanoid creature, who naturally only needs 4 hours of sleep or meditation per long rest. By instead doubling the rest time to 8 hours, the excesse energy is stored in the Sleep Transference Device.

Notes: Spellcaster