Control Gravity

You must have Reverse Gravity prepared and on your spell list to prepare or cast this spell.

This spell affects gravity in a 100- foot cube centered on a point within range. Designate a direction when you cast the spell (45 degree segments). For the duration of the spell gravity is changed to act in that direction as if it was down. All creatures and objects that aren't somehow anchored to the ground in the area fall towards the designated direction and reach the edge of the area when you cast this spell. A creature can make a Dexterity saving throw to grab onto a fixed object it can reach, thus avoiding the fall. If direction is parallel to a surface such as the ground it is treated like a vertical wall to a creature in the area and they can use a climb speed or similar if appropriate.

If some solid object (such as a ceiling) is encountered in this fall, falling objects and creatures strike it just as they would during a normal downward fall. If an object or creature reaches the top of the area without striking anything, it remains there, oscillating slightly, for the duration or is pushed beyond the area and will fall.

As an action on each subsequent turn you can either change the designated direction or move the effect up to 100ft. If the effect is moved a creature that was held aloft by the spell is moved with it but gets to make another save to hold on if possible.

At the end of the duration gravity returns to normal, affected objects and creatures fall back down if held aloft.

This technique was developed by the Feathered Weyrds of the La'Bel Mountains on the continent of frakturia and may not have been developed in other lands. Check with your DM whether it exists in your world.