Armor of Levistus

While wearing this armor, you have a +1 bonus to Armor Class, and you have resistance to the following damage types: necrotic, cold, and psychic.

Symbiotic Nature. The armor can't be removed from you while you're attuned to it, and you can't voluntarily end your attunement to it.

The armor requires fresh blood be fed to it. Immediately after you finish any long rest, you must either feed half of your remaining Hit Dice to the armor (round up) or take 1 level of exhaustion. Feeding the armor sentient creatures can satisfy the feeding requirement. 

This armor consists of a fitted metal chest piece worn with supple leather. Although it leaves the legs and arms relatively unprotected, this armor provides good protection for the wearer's vital organs while leaving the wearer relatively unencumbered.

Notes: Bonus: Armor Class, Resistance: Necrotic, Resistance: Psychic, Resistance: Cold, Combat, Warding