Mirror Shield

Magical item, shield, requires attunement, Wondrous

A large, smooth shield with a golden yellow hue. Its surface is crafted from a scale of a Tarrasque’s reflective carapace that was dug up as a fossil from thousands of years ago.

Magical Reflection. Your armor class increases by 2 while you are attuned to this item and holding it. Any time you are holding this shield, can see your attacker, and are the target of a magic missile spell, a line spell, or a spell that requires a ranged attack roll, roll a d6. On a 1 to 5, you are unaffected. On a 6, the effect is reflected back at the caster as though it originated from you, turning the caster into the target.