Multiattack. The archpriest makes three Radiant Burst attacks.
Radiant Burst. Melee or Ranged Attack Roll: +9, reach 5 ft. or range 60 ft. Hit: 27 (4d10 + 5) Radiant damage.
Holy Word (Recharge 4–6). Wisdom Saving Throw: DC 17, each enemy in a 20-foot Emanation originating from the archpriest. Failure: 21 (6d6) Radiant damage, and the target has the Stunned condition until the end of the archpriest's next turn. Success: Half damage only.
Spellcasting. The archpriest casts one of the following spells, requiring no Material components and using Wisdom as the spellcasting ability (spell save DC 17):
At will: Light, ThaumaturgyDivine Aid (3/Day). The priest casts Bless, Dispel Magic, Healing Word, or Lesser Restoration, using the same spellcasting ability as Spellcasting.