Storm Brand

The Storm Brand is a Long Sword available in Golden Sun: The Lost Age. As a Long Sword, it is usable by Isaac, Felix, Garet, and Piers. The Storm Brand boosts its wielder's Attack by 60. It is found in a treasure chest on the ground level of Air's Rock. It is sold for 2925 coins and later repurchased for 3900 coins.

The Storm Brand, as an Artifact, can unleash an effect called Hurricane. Hurricane converts all damage to Mercury, adds 21 attack points, and has the possibility to lower an opponent's Attack by 25% (50% if activated twice). Hurricane resembles a torrent of rain drops hitting the target before the holder of the sword attacks them physically.

The Storm Brand is the strongest weapon available to Felix before the player crosses into Gondowan; afterwards, it is usually given to Piers, whose high Mercury power makes it more effective. After the Disk Axe is obtained, though, the usefulness of the Storm Brand falls quickly; it's beaten even by a simple Claymore, which can be bought in Kibombo, in strength.