Halo of the Planetar

This magnificent crown is the rendered essence of a fallen planetar's halo, reforged into a ring of blazing solar fire that hovers a hand's breadth above the wearer's head. It sheds bright daylight in a 30-foot radius and dim light for another 30 feet beyond. Looking directly at the halo for more than a moment is uncomfortable for mortal eyes, and creatures of darkness flinch from its glow.

While wearing the halo, you gain immunity to necrotic damage and resistance to fire damage. Undead and fiends within the bright light area must pass a Wis save (DC 21) at the start of their turn or take medium radiant damage. You are immune to being charmed, frightened, or possessed.

At-will, swift action; you sprout wings of golden light, gaining a fly speed of 60 feet (hover). The wings persist as long as you wish; dismissing them is a free action. While flying with these wings, you may move through enemy spaces without provoking opportunity attacks.

At-will, std action, melee or ranged 60 ft; you may make a Smite attack against a single target. On a hit, deal heavy radiant damage. Against fiends, undead, and creatures of evil alignment, the damage is doubled and the target must also pass a Con save (DC 21) or be blinded until the end of its next turn.

Recharge after a long rest, std action, emanation 6; you release a wave of holy fire. All hostile creatures in the area take heavy radiant damage (Dex save DC 21 for half). Fiends and undead in the area take maximum damage and have disadvantage on the save.

The halo is acutely sensitive to its bearer. It dims and grows cold in the presence of consistent cruelty or treachery, and refuses to function entirely for a wearer who has crossed certain lines. The exact lines are not negotiable, and the halo does not explain them.