Project a magnetic barrier that deflects metallic objects.

When you are hit a metallic object (such as a sword, an arrow with a metal head or a metal ball thrown with the catapult spell), you may use your reaction to deflect the attack. The damage dealt by the attack is reduced by 1d10 + your spellcasting ability modifier.
If this spell reduces the incoming damage to 0, you may make a spell attack against the attacker, using the range and base damage of the weapon or spell that was used to make that attack.