Gaia Blade

The Gaia Blade is a Long Sword weapon found in Venus Lighthouse at the very end of Golden Sun. The Gaia Blade increases the wielder's Attack by 135, as well as boosting their Venus power and resistance by 20 each. It is the strongest weapon available in the first game. It's purchase value is 17000 coins, and it's sell value is 12750 coins.

The Gaia Blade is capable of unleashing the Titan Blade effect, which resembles a colossal sword crashing down on the target, digging into them, and detonating. It converts all damage to Venus, adds 70 attack points to the attack, and as a result of the sword's increase to the power of Venus attacks, it can be extremely deadly in the hands of Isaac. A common way to maximize its power is to give Isaac only Venus Djinni, as well as the Warrior's Helm, which increases Venus power by 10 and boosts Critical Hit rate.

As a Long Sword, Isaac, Felix, Garet, and Piers are capable of using it; however, due to his high Agility, Attack, and Venus power, Isaac is usually considered its best choice of wielder. If transfered to The Lost Age, however, the sword is effectively useless, as their will already be weapons even stronger available (Hestia Blade, Phaeton's Blade, etc.) as soon as Isaac's party joins.