Lively Aura

Within a 30-foot radius, you emit an aura of life-preserving energy. The aura revolves around you and moves with you until the spell stops. Yours and up to 6 nonhostile creatures you choose, health point maximum cannot be lowered, and every nonhostile creature in the aura, including yourself, is resistant to necrotic damage. Furthermore, a living creature that is not hostile recovers one hit point when it begins its turn in the aura with zero hit points.