Aldri's Dark Sphere

A tiny dark sphere appears where you designate, bending the space around it. It has its own gravity force, attracting every material body towards itself. Creatures entering or starting their turn in the area within 15 feet of the sphere must make a Strength saving throw. On a failure, they are pulled 5 feet toward the sphere and are unable to move in the opposite direction of it.

The bending of space creates stress on all material bodies. Creatures that enter the area for the first time on a turn or start their turn there must make a Constitution saving throw, taking 4d8 force damage on a failed save, and half that on a successful save. 

On your turn, you can spend a bonus action to direct the sphere and move it up to 10 feet.