Hero Shield

The Hero Shield is a Hardmode post-Plantera accessory that combines the effects of the Paladin's Shield and the Flesh Knuckles, redirecting 25% of damage from players on the same team while above 25% health and increasing aggro for the equipped player.

Trivia

 * Hero Shield may be a reference to the 1991 Nintendo game "The Legend of Zelda: A Link to The Past", bearing slight resemblance to the Red Shield sprite. Or it might be a combo of the Hero Shield from "The Wind Waker" and Link's shield from "The Legend of Zelda: A Link to The Past".
 * Despite being the combination of the Paladin's Shield and Flesh Knuckles, two accessories that provide the most defense of any accessory in the game, the Hero Shield only retains 7 defense.