Aura of Life
An aura radiates from you in a 30-foot Emanation for the duration. While in the aura, you and your allies have Resistance to Necrotic damage, and your Hit Point maximums can't be reduced. If an ally with 0 Hit Points starts its turn in the aura, that ally regains 1 Hit Point.
Aura of Life 5.5e 2024 vs. 5e 2014 edition differences
The 2024 version specifies an emanation with a fixed 30-foot radius, while the 2014 version states a 30-foot radius that moves with the caster. The 2024 version clarifies the aura is an emanation, and explicitly states "while in the aura" for resistance and healing effects, whereas the 2014 version states "in the aura."