Mirror shield

A Mirror shield is a piece of Slayer equipment used for fighting Cockatrices and Basilisks, requiring 20 defence and 25 slayer to wield. While fighting these monsters, the shield must be equipped, or the player's stats will be drastically reduced.

It can be bought from any Slayer master for 5,000 coins or by trading with another player. You can also buy it from the Grand Exchange.

Its defence bonuses are in between an iron kiteshield and a steel square shield.

Trivia

 * This shield may be a reference to a shield used to kill Medusa.
 * This shield may be a reference to a shield in The Legend of Zelda video game series.
 * Before a hidden update by Jagex, the mirror shield would reflect its surroundings when wielded.