Dress of Defense

Dress of Defense
Wondrous item, rare (requires attunement)

This dress has several decorative armor plates adorning it, but is otherwise made of layers of lush and sheer fabric. While wearing this dress, you gain a +1 bonus to AC if you are wearing no armor. You can use a shield and still gain this benefit. As a bonus action, you can speak the dress' command word to cause its armored plates to emit a protective magical force, causing the bonus to increase to +3 for 1 minute. Once this property of the dress has been used, it can't be used again until the next dawn.

Our ladyship believed that dressing for success was the same as dressing for defense. After multiple assassination attempts, she had more than proven her point.