Umix' Wall of Repulsion

A shard of metallic light flashes from your hand to a point within 30 feet. A shimmering wall up to 30 feet wide, up to 30 feet high and 5 feet thick. The wall is made of a randomly shifting magnetic field, which disrupts the path of any metal passing through it. Any ranged attack passing through the wall must be made with disadvantage. Any ranged weapon attacks that would be subject to disadvantage twice (e.g. an attack made at long range that also passes through the wall) automatically fail. For creatures wearing metal armor, the space occupied by the wall should be considered difficult terrain. For the duration of the spell, the caster is restrained.