Ball of Force

Conjure a tightly wound ball one foot in diameter of stored momentum around a thrown focus that floats at a fixed point. Any target that touches the sphere is knocked backward from the sphere 10 feet and takes 1d4 force damage. If the target impacts a surface before the knockback is exhausted, they take an additional 2d6 bludgeoning damage. Targets must make an Acrobatics saving throw or be knocked prone. The ball of force dissipates after being touched 1 time.

At higher levels, targets are knocked an additional 5 feet and take another 1d4 force damage for every spell slot level above 2nd. At every second level higher than the 2nd, the ball of force can be touched an additional time before unraveling.