The Gauntlet of Protection

Very Rare Wondrous Item
Requires attunement by a Cleric or Paladin

Divine Aegis. You can use a bonus action to make a spectral shield appear in your hand. While wielding the shield you gain a +2 bonus to your AC and have resistance against non-magical Bludgeoning, Piercing and Slashing damage. When you drop the shield, it fades from existence until you summon it again.
Savior's Touch. While attuned to this gauntlet you may cast the cantrip Spare the Dying at will. Once per long rest, instead of stabilizing, you may choose to restore an amount of hit points equal to twice your Constitution modifier to the creature you cast Spare the Dying on.

Related Items

The Gauntlet of Justice
Gauntlets of the Ascended Protector