Barrier of Repulsion

A magical barrier manifests within range that can be up to 30 ft long, and 20 ft high with reflective property. A spell attack that would pass this barrier must exceed your spell save dc in the attack roll or be bounced by reflective force(the distance remaining for the range of the spell is the distance the reflection travels. Any projectile spell that doesn't have an attack roll (I.E Fireball) must have the caster succeed a save using their spellcasting modifier against your spell save DC or suffer the same result.  If a creature attempts to pass the barrier they must make a strength check against the casters spell save DC or be shunted back 1d6x10ft.