You take a small portion of cosmic energy and force it into a black sphere, 1 foot in diameter within range. Within 15 feet of the sphere all light sources are extinguished and the ground is difficult terrain. Any creature that ends its turn within 15 feet of the sphere must make a Strength saving throw. On a failure, the creature is dragged 10 feet towards the sphere and takes 8d4 force damage. On a success, the creature takes half damage and is not moved.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher the damage is increased by 2d4.