A-Wall

This plate sized disk is capable of creating a wall offering any behind it defensive and offensive aid. As a bonus action, you can plant the disk in front of you and step on it to activate it. When activated it causes a 15ft. translucent wall centered on the disk to appear for one minute, granting all creatures behind it 3/4 cover from ranged attacks. A creature behind the disk side of the wall can shoot freely through the wall. Any ranged weapon attacks that pass through the wall from the disk side deal an extra 1d8 force damage.

Once used, the disk can not be used again until after a long rest.

Notes: Damage: Force, Bonus: Armor Class