Sword of Fire

Weapon

Legendary

It burns through the air and anything on the other side of it. It’s also alive and hard to hold. This sacred weapon can only be held (and tamed) by someone who’s mastered fire. It’s one of the four Weapons of Spinjitzu, and it helped create Ninjago. The sword can also be turned into the blade cycle by only the master of fire, Kia

The Sword of Fire was one of the four Golden Weapons used by the First Spinjitzu Master to create Ninjago. After forging the island, the weapons were passed onto his sons, Wu and Garmadon, who were to keep them safe. Yet when Garmadon was corrupted by the Great Devourer, he tried to steal the weapons, using the Sword of Fire and Nunchucks of Lightning to fight his brother. Wu was forced to defeat his brother, who was condemned to the Underworld, after which Wu hid the Golden Weapons.
Many years later, Wu trained four ninja and sent them off to claim the weapons. Kai, the Master of Fire, claimed the sword and protected it from Lord Garmadon. When Samukai wielded the four Golden Weapons simultaneously, he was disintegrated, creating a portal that allowed Garmadon to escape the Underworld. The ninja would wield the Golden Weapons—which doubled as vehicles, allowing Kai to create the Blade Cycle