Cuirass of Miracles

Armor (medium), legendary (requires attunement)

This +1 breastplate is crafted of the finest Elysian bronze, causing attacks from beasts to have disadvantage against you. While wearing this armor, you have resistance against necrotic damage and can gain advantage on abilities which decrease your maximum hit points, such as a wraith’s Life Drain ability. Whenever you are damaged, you gain advantage on saving throws against the abilities and spells of the creature that damaged you until the end of your next turn. When you would drop to 0 hit points, the armor automatically heals you 6d8 + 10 hit points; this does not require an action. If an ally within 30 feet would drop to 0 hit points, as a reaction you can heal them 3d8 + 5 hit points. Once you use either version of this ability, neither can be used again until you complete a long rest.

Epic Attunement. You gain immunity to necrotic damage and to abilities which decrease your maximum hit points.

When an ally within 30 feet would take necrotic damage, as a reaction you can grant them resistance to necrotic damage and advantage on saving throws against effects that would decrease their maximum hit points. This effect lasts until the beginning of your next turn. In addition, you can use both the armor’s ability to heal yourself and to heal an ally described above once each before needing to complete a long rest to recharge both uses.