Sol Blade

The Sol Blade is a Long Sword-class weapon Artifact available in Golden Sun: The Lost Age, and is the best weapon in the series. It is found in a treasure chest deep in Mars Lighthouse, as a rather easy reward for solving a platform-based ice puzzle shortly before a boss battle with the Flame Dragons. This Long Sword-class weapon is unique in that only Isaac and Felix can wield it. Its buy value is 31200 coins and its sell value is 23400.

The Sol Blade increases the wielder's base Attack rating by 200 points. The sword is a pure-element weapon because its physical attack is itself an attack whose resulting damage is either increased or decreased based on how the user's Mars power compares to the target's Mars resistance. Its Unleash effect is 'Megiddo (the Hebrew term for Armageddon), 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 Venus power measures against the target's Venus resistance, and then the resulting damage there is multiplied by three, an extremely powerful and consistent effect. Possibly the most visually elaborate of all Unleash effects, the user leaps high into the air, the sword glowing bright red over his head. He then touches the blade of the sword into a fiery sphere that could be said to represent a star such as the Sun itself, and slings the celestial body on their target, where it explodes with tremendous force.

The Sol Blade is verifiably the best weapon in the game. Its 200 Attack is only beaten out by a Darksword's 210 Attack, but as that weapon's Venus-based Unleash doesn't multiply damage it does not compare to the Sol Blade. Its only competition among other weapons are the Excalibur and Tisiphone Edge, both of which have Unleash effects that have the potential to triple the damage done, but the Sol Blade always scores triple damage so it will always end up being in the player's inventory by the game's end. To maximize the weapon's power, you can equip on an Adept a specific weapon setup that will increase the chance the weapon will Unleash Megiddo whenever its wielder launches a physical attack: The Sol Blade itself Unleashes Megiddo with a base rate of 35%. The Venus Adept can equip the Valkyrie Mail to add 20% to the Unleash rate to make it 55%. Then he can equip Riot Gloves to increase it by 20% more (as well as increase attack power somewhat), then equip a Mythril Helm to increase it by 12% more, and finally Hyper Boots to increase it by 12% more to make for an Adept that has a 99% chance of Unleashing Megiddo everytime he attacks. This character becomes a complete powerhouse warrior that will help the party defeat the Doom Dragon final boss much quicker than otherwise and can fell most common enemies in one hit.

In the code for the original Golden Sun there exists the Sol Blade, including its item icon and its status as a Long Sword-class weapon artifact. During development the Sol Blade was originally planned to be the game's "ultimate weapon", apparently, but was reserved for an appearance in the sequel and remains normally inaccessible to players without a hacking device that grants access to the game's Debug Room. The Sol Blade in this incarnation has "???" as its item description and has no Unleash coded for it; it is merely a weapon artifact that increases base attack by 138, which is technically the highest attack rating increase in the original Golden Sun more than the "proper" recipient of that honor, the Gaia Blade's 135 Attack power.