lonelynoose
First Post
If it's a floating shield that moves and turns to protect you, that could protect your back with the same AC bonus. The argument against surrounding field is that Shield doesn't block or even reduce area effects like Fireball.
Fireball doesn't emanate from a central point. It engulfs a whole area simultaneously. Including within your shield, aka the space your body occupies. We know this because all those within take equal damage.