Mirror Aegis

Armor (shield), rare

This polished brass shield features a mirror at its center. When a creature within 5 feet of you hits you with an attack, you can use your reaction to speak the shield’s command word. When you do, the mirror cracks, and you gain the benefits of the mirror image spell; you immediately roll the spell's die to determine whether the triggering attack instead targets one of your duplicates. This property of the mirror can't be used again until the next dawn, at which point the mirror magically repairs itself.

I'll take the seven years of bad luck if it means I can survive to see tomorrow.