Shrapnels

You shape metal into shrapnel that spins around you at a surprising speed. For the duration of the spell you gain the following benefits:

• You gain +4 to AC;
• Nonmagical projectiles targeting you are destroyed as soon as they come within 5 feet of you;
• Ranged attacks made with magical weapons have disadvantage to hit you and, if they hit, deal only half damage;
• When hit by a melee attack, the attacker must make a Dexterity saving throw. On a failure, the attacker takes 12d10 lacerating damage, or half that on a success. You take only half the damage;
• Creatures that enter or start their turns in the spell’s area must make a Dexterity saving throw or take 12d10 lacerating damage; a creature can’t take this damage more than once per round;
• When you make a melee attack against a target, that target is considered to have entered the spell’s area. When the spell ends, the metal returns to its original form.