Lightning Sword

The Lightning Sword is a Long sword in Golden Sun: The Lost Age. It is obtained in a room in Tundaria Tower that can only be reached by using Burst on a cracked wall of ice, locked up in a chest. The Lightning Sword increases the wielder's Attack by 134. As a Long Sword, it can be used by Isaac, Felix, Garet, and Piers. It is sold for 8550 coins and later repurchased for 11400 coins.

The Lightning Sword is capable of unleashing the Flash Edge effect. Flash Edge converts all damage done to Jupiter, adds 46 attack points to the attack, and possibly inflicting a foe with delusion. Visually, the Flash Edge resembles nothing more than a regular attack with a few flashes of light appearing on impact.

The Lightning Sword is a fairly effective "placeholder" weapon to stronger weaponry obtained in Lemuria, such as the Hestia Blade, but afterwards, it is in effect an inferior, obsolete piece of weaponry. If equipped alongside a piece of defensive equipment created by the Sylph Feather called the Aerial Gloves, it can be deadly for the time it can be used effectively.