Claymore

A Claymore ("Bastard Sword" in the Japanese version) is a Long Sword-class weapon available in both Golden Sun and Golden Sun: The Lost Age. In the first game it is bought in the towns Altin and Kalay, and in the second it is bought in the towns Kibombo and Yallam. Being a Long Sword-class weapon, a Claymore can be equipped on Isaac, Garet, Felix, and Piers. It increases the wielder's base Attack rating by 70 points. Its buy value is 4000 coins and its sell value is 3000 coins.

In Golden Sun, Claymores are the strongest common weapon in the shops at Altin, but at Kalay it will be overtaken by the Great Axe at 5200 coins. The weapon shop in Altin will be open once the town has been un-flooded, and a Claymore is a worthy purchase to replace either a Broad Axe or the Arctic Blade if they're held by the two warrior Adepts in your party by then. With a price tag of 4000, it is only really sound to buy one Claymore, especially considering that in the upcoming Lamakan Desert dungeon-style location is a strong Mars-based axe artifact called the Vulcan Axe. After Altin, the Claymore will likely remain in your party's inventory until by the time you reach Tolbi.

In Golden Sun: The Lost Age, much of the game's focus is on completing puzzles in the dungeon-style locations that provide as rewards weapon artifacts far superior to commonly bought weapons and even weapon artifacts that can normally be bought in vendors, so you should not buy and equip this weapon because it will most likely be overpowered by the equipment you already have (the Disk Axe, for example).