Masamune

The Masamune is a Light Blade found in Golden Sun: The Lost Age. It is found in a treasure chest in Yallam, but the Force Psynergy is required to reach the chest, meaning the Masamune will be unavailable until after Jupiter Lighthouse. It can be bought for 16400 coins and sold for 12300 coins. Being a Light Blade, it can be equipped by Isaac, Felix, Garet, Jenna, Ivan, and Piers. It increases the wielder's attack by 161.

The Masamune's Unleash attack is Rising Dragon, which activates at a rate of 40% (notable, since most Unleashes activate at a rate of 35%). Rising Dragon converts all damage to Jupiter damage and attacks with an additional 62 attack points. Also, there is a chance of doing twice the normal amount of damage. Visually, Rising Dragon resembles a light blue cloud with the shape of a dragon's head at the front streaming from the attacker and arcing slightly before striking the target from above. If Rising Dragon does double damage, a second, identical cloud follows, only this cloud strikes from below.

The Masamune is a powerful weapon that can be acquired easily and be equipped to almost anyone. However, it remains unavailable until late into the game, meaning it merely serves as a placeholder for more powerful weapons like Tisiphone Edge and Excalibur, both of which are capable of attacking for three times their normal damage. However, in terms of raw power, no weapon can outdo a two-strike Rising Dragon from the Masamune until the above mentioned weapons or the Sol Blade are acquired.