Enhanced Shield

An invisible barrier of magical force appears and protects you. Until the start of your next turn, you have a +5 bonus to AC, including against the triggering attack, and you take no damage from magic missile.

If cast with a 3rd level spell slot or higher, you gain resistance to all damage other than force whilst the shield is active.

If cast at 5th level or higher you gain resistance to all damage whilst the shield is active. If hit by an attack whilst protected in this way, any damage taken is reflected onto the attacker as force damage. This reflected damage cannot be increased in any way.