Cosmic Sphere

You point at a location within range, and a glowing, 1-foot-diameter ball of pure black cosmic energy streaks there and explodes in a 20-foot-radius sphere. Each creature in that area must make a Constitution saving throw. On a failed save, a creature takes 6d4 force damage and another 4d4 radiant damage at the end of its next turn. On a successful save, a creature takes half the initial damage and no damage at the end of its next turn.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the initial damage increases by 2d4 for each slot level above 1st and the secondary damage increases by 1d4.