Swift Sword

The Swift Sword is a Light Blade found in both Golden Sun games. Being a Light Blade, it can be equipped by Isaac, Felix, Garet, Jenna, Ivan and Piers. It increases the wielder’s attack by 104 and their Wind power by 10. It can be bought in Lalivero (in Golden Sun) and Contigo (in The Lost Age) for 9400 coins and sold for 7050 coins.

The Swift Sword's Unleash effect is Sonic Smash (Sonic Slash in Japan), with the standard base activation rate of 35%, which is a physical attack whose resulting damage is either increased or decreased based on how the user's Jupiter power measures against the target's Jupiter resistance. Although normally Sonic Smash doesn’t increase attack power, it occasionally does three times the normal amount of damage. Visually, Sonic Smash resembles the attacker rushing up and hitting the target, with small shockwaves released on impact. Normally the attacker only hits the target once, but when Sonic Smash does triple damage the target is hit three times.

In Golden Sun, the Swift Sword can overpower even the Gaia Blade when Sonic Smash does triple damage. The Swift Sword is best placed into Ivan's hands, since it boosts his already high Jupiter power and Sonic Smash does Jupiter damage. In The Lost Age, the Swift Sword is unavailable until late in the game, and so players will probably have already acquired stronger and more reliable weapons. Despite the Swift Sword having an unleash effect that can potentially inflict triple damage, the Excalibur is regarded as being superior, because its unleash "Legend" (which is also of the Jupiter element), not only has the chance to triple damage inflicted, but also increases damage done by 73. However, since the Swift Sword is a Light Blade, it is equippable by Jenna and Ivan, whereas the Excalibur is not.