Aegis, Variant (5e Equipment)
From D&D Wiki
Armor (shield), rare (requires attunement)
This shield has the real face of Medusa fused into it. While holding this shield, are immune to being petrified, and have a +1 bonus your AC. This bonus is in addition to the shield's normal bonus to AC.
Gorgon Scare. As an action, you may unleash a wave of horrifying energy at a creature within 30 feet of you. The creature must make a DC 16 Wisdom saving throw or be frightened of you for 1 minute. They may repeat the saving throw at the end of their turn, and if they succeed, they are immune to this effect for 24 hours.