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.
RollQuest ships the D&D 2024 SRD as a content pack, on a 5e character sheet that does the maths - roll from the sheet and let the numbers work themselves out. Free to start.