Mummy Wraps

Wondrous item, rare (requires attunement)
  As Hallow’s Eve approaches, the undead of Hallow’s Inn get restless. It’s like they know that the quarry upon which they feast have this one day each year to escape, and they want to cram their mouths full with every morsel. The inn seems to lock and unlock doors of its own accord, funneling its inhabitants together. At times like these, fighting on after death is the only way to not get eaten, no matter the cost.
  These linen-wrap gloves have a rough, sandy quality to them, but feel durable and resilient.
  Cursed. These gloves are cursed, and becoming attuned to them extends the curse to you. As long as you remain cursed, you are unwilling to part with the gloves, wearing them at all times.
  Mummification. Whenever you are reduced to 0 hit points, you don’t fall unconscious. Instead, the linen wraps extend, mummifying you and allowing you to fight on. Each time you take damage in this state, your hit point maximum is reduced by the damage you would have taken if you had hit points. If your hit point maximum is reduced to 0, you die and are immediately reborn as a mummy (which the GM controls). Your hit point maximum is restored when you finish a long rest.
  Decomposition Delay. While you wear these gloves, you have resistance to necrotic damage.