Void ForceWall

When two or more of your allies are within 5ft of each other and link shields and speaks the command, The wall appears in any orientation you choose, as a horizontal or vertical barrier or at an angle. You can form it into a hemispherical dome or a sphere with a radius of up to 10 feet, or you can shape a flat surface made up of ten 10-foot-by-10-foot panels. Each panel must be contiguous with another panel. In any form, the wall is 1/4 inch thick. It lasts for the duration. Nothing can physically pass through the wall. It is immune to all damage and can't be dispelled by dispel magic. A disintegrate spell destroys the wall instantly or breaking the formation and or Concentration can also destroy it. Damage the shield takes from any magic spell collects the energy, and can then be reused to form javelins which can launch at any creature within 40 ft of the Shield-wall and takes 2d6 psychic damage and must role a Dex saving throw or is knocked prone. If you succeed on save takes half damage and is not knocked prone.