Parrying Blade (5e Equipment)

Weapon (any sword), rare (requires attunement)

A shimmering haze surrounds this weapon and the wielder is protected by glowing bands of power.

You have a +1 bonus to attack and damage rolls made with this magic weapon.
While wielding the parrying blade and another creature hits you with a melee weapon attack, you can use your reaction to add your proficiency bonus to your AC for that attack, potentially causing the attack to miss you.