Shield of Kord (5e Equipment)
From D&D Wiki
The Shield of Kord is a rather large iron shield with the face of Kord, the god of storms and the lord of battle, engraved on the front of the shield. This shield grants a +2 bonus to your AC. You can activate the shield as an action, making the shield's eyes glow with fire, releasing a 30 foot cone of force. A creature within this cone must make a DC 18 Strength saving throw to take half of the 6d6 bludgeoning damage and not be pushed back 10 feet.
The shield regains use of this effect at dawn.