Levatine

A Levatine is a Long Sword-class weapon Artifact available in Golden Sun: The Lost Age and Golden Sun: Dark Dawn. In every game it appears in, it is acquired by bringing some Mythril Silver to that game's blacksmith. It is worth noting, however, that Mythril Silver is forged into one of several randomly-selected items, so there is no guarantee players will receive a Levatine. Being a Long Sword-class weapon, the Levatine can be equipped on warrior-style Adepts, namely Felix, Piers, Isaac, Garet, Matthew, and Tyrell. It can be bought for 19700 coins and sold for 14550.

A Levatine increases the wielder's base Attack rating by 173 points. Its Unleash effect is Radiant Fire, with the standard base activation rate of 35%, which is a physical attack with an additional 66 points of damage added, and then the resulting damage is either increased or decreased based on how the user's Mars power measures against the target's Mars resistance. In addition, the effect may ignore half of the target's Defense rating during the attack, which increases the damage done. Radiant Fire visually resembles the wielder’s attack explode into a series of circular fire patterns.

A Levatine is technically one of the game's best weapons because it is about equal to the Fire Brand, and the two are the strongest Mars-based weapons. While the Levatine will always do enhanced damage because of its Unleash's side effect, the Fire Brand is a pure-element weapon whose Unleash may put the target to Sleep, so if you have both weapons deciding between one over the other is a matter of personal taste. However, they are not the actual best weapons because weapons of other elements such as the Tisiphone Edge, Excalibur, and Masamune can outright multiply the damage they inflict with their Unleashes, so while the Levatine and Fire Brand are solid for a Mars Adept warrior like Garet to wield, it might be better for him to use one of the above three weapons for potentially much stronger damage.

A Levatine is often compared to the Mythril Blade, the other weapon artifact that can be forged from a Mythril Silver, and the more-common-to-forge Mythril Blade has lower power levels and has an  Unleash that is of the Mercury element and Seals the target's Psynergy. Many players would identify the Levatine as a better weapon, but to be fair that would only be the unshakable truth if it's a Venus or Mars  Adept who is considering equipping one of the two weapons. The Mythril Blade is a strong, solid weapon for the Mercury Adept warrior Piers to equip just as the Levatine is a solid weapon for the Mars Adept warrior  Garet.

In Dark Dawn, the Levatine gains two new Unleashes: Critical Move and Centurion. Critical Move is a non-elemental attack which multiplies damage by 1.4, while Centurion is a Jupiter-based move that multiplies damage by 2.4 and has a chance to ignore half of the target's defense. Radiant Fire remains the weapon's main Unleash, but is slightly altered in that it now has a range of 3 targets.

As a Mars-based weapon, the Levatine is an excellent choice for Tyrell to wield. It has a slight advantage over the Fire Brand, in that the Levatine can be easily forged, while the Fire Brand is only available as a rare drop. Like with Garet, however, the player may choose to replace the Levatine with a weapon, such as Excalibur or the Tisiphone Edge, that multiplies damage.

Cultural references
Levatine, also called Laevateinn, is the sword of Surtur, the giant of fire in Norse lore who is believed to be the one who will finish the destruction of the world at the end of the battle of Ragnarok.