Legendary Sword

The Legendary Sword (伝説の剣) is one of the four Legendary Weapons. The person who possesses this weapon is called the "Sword Hero (剣の勇者)". It retains a blue gem at its center while undergoing transformations.

The hero has chosen to wield the Legendary Sword, primarily noted to be the strongest in attack power. The Sword Hero's Enhancement Method revolves around proficiency. A user can raise the proficiency of a weapon by frequently using it, after which they can even transfer that proficiency to a new weapon when the current one becomes obsolete. The current Sword Hero is Ren Amaki.

Owner
The current Sword Hero is Ren Amaki.

Powers
The Legendary Sword gives its user great offensive power and can evolve and transform to become stronger however the user cannot equip any other weapons. It has a special jewel in the middle which can transform the Sword under specific conditions.

Trivia

 * The order in which swords are unlocked affect the abilities gained by future swords.