Armory Rain

Multiple, radiant weapons of various types hover above you, flying forward to form a line 100 feet long and 5 feet wide starting from you in a direction you choose.  These radiant weapons rain down on anyone in their path, pinning them to the ground. Each creature in the line must make a Dexterity saving throw. 

A creature is restrained and takes 6d6 radiant damage on a failed save, or half as much damage on a successful one and is not restrained.  The restraints last for the spells duration or a creature restrained by the radiant weapons can use its action to make a Strength check against your spell save DC. On a success, it frees itself.