Anti-Gravity Sphere

You create a 30 foot sphere, centering on you, within which gravity does not apply. All creatures and loose objects within the sphere and who enter the sphere after it has been cast, barring you unless you wish to affected, are lifted a random amount of feet off of the ground, this amount is determined by rolling 3d10s and adding the numbers rolled together. Whilst lifted in this way, unless they can fly, moving 1 foot expends 10 feet of movement. Regardless of whether the creature dealing them can fly or not, all melee attacks have disadvantage and only deal half damage and all ranged attacks deal no damage. All spell attacks act as normal.