Earth Bind

You call upon the primal forces of the earth to ensnare and bind flying creatures within range. Choose one creature that is flying within 120 feet of you. The target must make a Strength saving throw. On a failed save, the creature's flying speed is reduced to 0, and it descends at a rate of 60 feet per round until it reaches the ground, taking fall damage equal to 1d6 bludgeoning per 10ft it falls.

Additionally, the creature cannot take any action to attempt to move vertically, effectively rendering it grounded for the duration of the spell.

You can take an action to try to Bind a foe that previously succeeded on their saving throw, so long as they're still in range.