Level
7th
Casting Time
1 Action
Range/Area
100 ft
(50 ft *)
Components
V, S, M *
Duration
Concentration
1 Minute
School
Transmutation
Attack/Save
DEX Save
Damage/Effect
Control
This spell reverses gravity in a 50-foot-radius, 100-foot high Cylinder centered on a point within range. All creatures and objects in that area that aren’t anchored to the ground fall upward and reach the top of the Cylinder. A creature can make a Dexterity saving throw to grab a fixed object it can reach, thus avoiding the fall upward.
If a ceiling or an anchored object is encountered in this upward fall, creatures and objects strike it just as they would during a downward fall. If an affected creature or object reaches the Cylinder’s top without striking anything, it hovers there for the duration. When the spell ends, affected objects and creatures fall downward.
* - (a lodestone and iron filings)
It would have been really nice if they had clarified whether this interacts with flying creatures differently than creatures on the ground.
Considering Baphomet explicitly uses reverse gravity in his lair to "reach flying creatures" it presumably doesn't effect them. It just reverses gravity, it doesn't intensify gravity in any way.