Rune Blade

A Rune Blade is a Long Sword-class weapon found in Golden Sun: The Lost Age. It is acquired as a very rare drop from a Lesser Demon fought in Magma Rock. The Rune Sword is bought for 15000 coins while its resale value is 11250 coins. Visually, the Rune Blade resembles a thick black sword with a pair of blue dots on its blade and a blue shadow.

The Rune Blade carries a non-elemental attack rating of 162. This sword has the Unleash effect Void Beam, which activates at a rate of 35% (which is standard) and converts the attack into a Jupiter-elemental attack with 54 extra attack points added, and the effect has a chance of sealing the foe's Psynergy. The Void Beam visually resembles the wielder summoning a 3D hologram of a symbol that draws itself in front of him as the camera swirls around the battlefield, and the symbol generates a thick white-purple beam that pierces through the target.

The Rune Blade, as a Long Sword-class item, can be wielded by Isaac, Garet, Felix, and Piers. The Rune Sword is quite powerful, and if it is acquired in Magma Rock which takes place shortly after Jupiter Lighthouse it functions as a good upgrade to the similar Jupiter-based long sword Phaeton's Blade found in the Lighthouse. In a game where only the best weapons are used and considered, though, the Rune Blade is merely a placeholder weapon for the Excalibur, an ultimate weapon that is also Jupiter-based.