Cripple

Each creature within 30 ft. of you must make a constitution saving throw. On a failed save, a loud 'snap' is heard as the creature's legs give way underneath it and it falls prone. To end the condition by standing, a creature must use the entirety of its turn without doing anything else. Should you choose to concentrate on this spell, a creature must succeed on a constitution saving throw before doing so. Each time it fails this save, it wastes its turn doing nothing and takes 1d6 bludgeoning damage.