Avatar of Osiris

You become a divine incarnation of Osiris, a guardian of life, death, and resurrection. For the duration:

• You gain resistance to necrotic and radiant damage.
• Once per turn, when you deal damage with a spell or weapon, you may choose to heal an ally within 30 feet for half the damage dealt.
• Any creature reduced to 0 hit points within 30 feet of you automatically makes a death saving throw with advantage.
• While this spell is active, undead creatures within 30 feet take 2d10 radiant damage at the start of their turn.