SFS Standard Gravity Field [three-actions] Spell 8

Traditions arcane, divine, occult, primal
Range 100 feet
Area 30-foot radius, 100-foot-tall cylinder
Duration sustained up to 1 minute

Bending the laws of the Universe to your will, you increase the forces of gravity in an area. All flying creatures in the area descend 40 feet. The entire area is greater difficult terrain for Flying and Climbing creatures, and difficult terrain for creatures on the ground. Any creature pulled to the ground by a gravity field takes bludgeoning damage as though it had fallen.

Gravity in the area increases by one step (for example, zero-g becomes low gravity, low gravity becomes standard, standard gravity becomes high gravity, and high gravity becomes extreme gravity).