Demon Mail

The Demon Mail is a cursed Armor-class piece of armor found in Golden Sun. Being an Armor class piece of armor it may be worn by Isaac, Garet, Felix, and Piers. It is found on the bottom floor of Crossbone Isle at the Pirate Ship, and it will materialize only if the player conquers the optional Deadbeard boss battle nearby. It has the strongest increase of defense in the original Golden Sun.

The Demon Mail is a Cursed Artifact that increases base Defense by 50 but lowers Jupiter resistance by 10. Its buy value is 17000 coins and its sell value is 12750 coins.

Although it has the highest defensive rating in the original game, it is not actually the best because of the decrease in Jupiter resistance. If the player chooses to have one player equipped with the Cleric's Ring, than they may choose to equip the Demon Mail in order to maximize the Cleric's Ring's effect. Otherwise they are better sticking to the Dragon Scales or the Storm Gear.