Angelic Armor (5e Equipment)
From D&D Wiki
Armor (light, medium or heavy), very rare (requires attunement by a good character)
A suit of armor forged in Mount Celestia. Powerful enough to protect a hero on his journey through the the world, or even beyond the Gates of Hell itself. These armors are made for the most faithful and divine mortals and angels alike.
While wearing this armor, you gain a +2 bonus to AC, you have advantage on all saving throws against effects caused by fiends, and it creates an aura in a 5-foot radius around you. Fiends in the aura have disadvantage on saving throws.