This is a Divine Aura
You and friendly creatures within 5 meters of you can't become diseased, has resistance to poison damage, and has advantage on saving throws against curses, reductions to ability scores, reductions to hit point maximums and effects that cause any of the following conditions: Blind, Charmed, Deafened, Frightened, Paralyzed, Petrified, Poisoned, and Stunned.