Aegis (5e Equipment)
From D&D Wiki
Armor (shield), rare (requires attunement)
This magic shield bears the supernaturally horrifying visage of a gorgon. While holding this shield, you have an extra +1 bonus to your AC and to Constitution saving throws. You also have advantage on any Charisma (Intimidation) check made to intimidate humanoids that can see this shield on your person.
If the aegis is destroyed, all creatures within 60 feet must succeed on a DC 18 Wisdom saving throw or take 6d6 psychic damage.