As an action, yellow strips of magical energy lash out at a creature that you can touch or see within 100 meters which must make a Reflex saving throw.

On a failure, its flying speed (if any) is reduced to 0 meters for the duration. An airborne creature affected by this spell descends at 20 meters per round until it reaches the ground or the spell ends.

Augment

You can target one additional creature for each additional mana expended. The creatures must be within 5 meters of each other when you target them.