Dokar's Destructive Disk

You summon a glowing disk of divine light and launch it towards your enemies. This effect takes the form of a 100-foot line that is 5 feet wide. All creatures in this line must make a Dexterity saving throw. The target takes 5d6 radiant damage on a failed save, or half as much damage on a successful one. If the target is a fiend or undead, the damage is changed to a d8 instead of a d6.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d6 or 1d8 for each slot above 5th.