Location: In a locked and trapped Opulent Chest in the Selûnite Outpost area of the Underdark.Many an adventurer has found themselves swallowed up by the dark throat of some nameless dungeon, aching for a glimpse of light. Although heavier armor usually provides more protection, keep in mind they may also hinder your characters' spell casting. Medium Armor can be equipped to a character's body in their designated inventory slot providing AC and sometimes special effects. Luminous Armour is a Medium Armor in Baldur's Gate 3. Radiating Shockwave: When the wearer deals Radiant damage, they cause a Radiant Shockwave.