Behold

You test the confidence of a group of creatures before the gods by conjuring a vision of the upper planes. Each creature in a 40-foot cone in a direction you choose must make a Charisma saving throw. On a failed save, a creature takes 5d6 radiant damage and is stunned until the end of its next turn by the incomprehensible glories that it sees. On a successful save, it takes half as much damage and isn’t stunned.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the size of the cone increases by 10 feet for each slot level above 4th.