crystalline field

when cast you summon 5 to 15 crystalline formations around what you are targeting. Once casted you can use a bonus action every turn to fire two beams of light at the formations bouncing of them and hitting what you are aiming at each dealing 2d8 piercing damage. anything outside of the formation that you aim at with the beams roll disadvantage on hitting you cannot fire the light directly at a creature if so, it dissipates before hitting no matter the range.