open wallmarket. go to 'Attack' tab along the top. find 'Shield' in the list on the left. double click the name to change name and description of magic. in 'Animation ID:' put '6E' [this is the 'Stardust March' animation].'Attack Damage:' set both to X2 for standard offensive magic damage calculation. change the 'Camera (single) (multiple)' to an offensive magic eg.fire [0006 0024] so the camera focuses on the target and not your player when you use the magic. in 'Attack Target' tick Enable Selection, Start on Enemies, Start as multiple and Toggle multiple, un-tick the rest (if you want magic to always attack all targets without the 'All' materia un-tick Toggle multiple). 'Attack Element' Holy, 'Restore Type:(?)' set to FF None, ...and i think everything else is preference as to attack statuses and properties, mp cost and attack strength....... then change Shield materia in materia tab, element, equip effect, AP etc and your all set