Dragon sq shield

The Dragon square shield is a rare piece of armour, among the best shields in the game. It is found in two halves, which can be merged by using them with a hammer and anvil if you have level 60 smithing. The Shield right half can be purchased in the Legends' Guild for 750,000 coins, also to wield it you have to complete the Legends Quest. The shield left half, however, must be obtained as a rare drop from any monster that drops gems.

Trivia

 * Vannaka, the Combat Instructor and Slayer Master, wields a steel two-handed sword along with the dragon square shield at the same time.