Prismatic Plate

Armor (plate), legendary (requires attunement)

You have a +3 bonus to AC while wearing this resplendent armor of transparent metallic crystal that shimmers constantly, shedding light as a light spell in one of the colors of the rainbow. As a bonus action, you can change the color of light shed by the prismatic plate, and that color remains dominant until you change it again. When you are affected by a prismatic spray or prismatic wall, you ignore the effect that matches the dominant armor color (other colors of those spells affect you normally). In addition, each color provides a unique type of protection.

Color	Effect
Red	resistance to fire damage
Orange	resistance to acid damage
Yellow	resistance to lightning damage
Green	resistance to poison damage
Blue	resistance to cold damage
Indigo immunity to petrification and advantage on saving throws to avoid being paralyzed
Violet advantage on saving throws against being blinded, deafened, charmed, or banished to another plane