Defense Screen

You create on one edge of your 5 foot square an invisible screen of protection, 5ft by 5ft, which has 40 hit points and no damage will pass through until these have all been lost. If an attack deals more damage than the remaining hitpoints of the screen, the screen is destroyed any additional damage passes through to the caster. As a bonus action on subsequent turns you may restore 20 hit points to the defense screen so long as it still has one or more left, and you can move it to a different facing edge of your current square with five feet of movement. While concentrating on this spell your movement speed is halved and the screen moves with you. The screen is immediately destroyed if damaged by a disintegrate spell or a Sphere of Annihilation though no damage passes through in this instance.