Entropic Detonation

You point at a location within range, and a thin beam of crackling, black, temporal energy shoots out of your finger and detonates in a 20-foot radius sphere. Each creature in that area must make a Constitution saving throw. On a failed save, a creature takes 7d6 force damage and cannot take a reaction until the start of your next turn. On a successful save, a creature takes half damage and can still take reactions.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases for by 1d6 for each slot level above 4th.