This homebrew was made by u/Monkey_DM on Reddit, who has given clearance for a port by me to DnDBeyond.

Choose one creature within range, it is impacted by a devastating gravitational force and must make a Strength saving throw. On a failed save, the creature takes 6d10 bludgeoning damage and is knocked back 120 feet. The knockback stops early if the creature hits a solid surface or a creature of its size or larger. On a successful save, a creature tales half as much damage and isn't knocked back.

If the target lands on another creature, that creature must make a Dexterity saving throw or take (7 x the size difference between the flung creature and the landing pad creature) bludgeoning damage, to a minimum of 7 damage, or half as much on a successful save.

When you cast this spell using a spell slot of 5th level or higher, the flung creature takes an additional 1d10 bludgeoning damage and travels 10 additional feet each slot level above 4th.