Wyvern's Burst

You and target creature both explode in holy light, damaging foes and restoring allies. Each creature of your choice except you and the target, in a 20-foot-radius sphere centered on you and your target must make a constitution saving throw. A target takes 6d12 radiant damage on a failed save, or half as much damage on a successful one. You may also heal any target except you and the target in the radius half of the damage roll.  A creature in the area of more than one holy blast is affected only once.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d12 for each slot level above 4th.