Phaeton's Blade

Phaeton's Blade is a Light Blade found in Golden Sun: The Lost Age. It is found in a treasure chest in Jupiter Lighthouse, in the room almost completely filled with Hover panels. It can be bought for 13600 coins and sold for 10200 coins. Being a Light Blade, it can be equipped by Isaac, Felix, Garet, Jenna, Ivan, and Piers. It increases the wielder's attack by 151.

Phaeton's Blade's Unleash attack is Light Surge. Light Surge converts all damage to Jupiter damage and attacks with an additional 51 attack points. Also, there is a chance that it will cause delusion in the target. Visually, Light Surge resembles a multitude of light beams descending upon the target.

Phaeton's Blade is the second strongest weapon at the time it can be obtained (the strongest is the Rising Mace), and it isn't long until stronger weapons become available. However, Isaac and Felix's teams join forces after Jupiter Lighthouse is cleared, meaning there are twice as many Adepts to pass the Blade on to after it is replaced. Since Light Blades can be used by so many Adepts, it will probably remain in someone's possession for quite some time, perhaps even until Mars Lighthouse.