Compulsion of Pennace

You open a gateway to the light filled realm of Celestia.  A 20-foot-radius sphere of holy light and searing warmth appears, centered on a point within range and lasting for the duration. This gateway is filled with a cacophony of soft whispering confessions that can be heard up to 30 feet away. No darkness, magical or otherwise, can darken the area, and creatures fully within the area are blinded by the holy light.

The gateway creates a warp in the fabric of space, and the area is difficult terrain. Any creature that starts its turn in the area takes 2d6 radiant damage from the pure light. Any creature that ends its turn in the area must succeed on a Dexterity saving throw or take 2d6 fire damage as flaming chains strike against it trying to bind them to a path of atonement.