|“Whoever controls the Armor controls Firstbourne! And he who controls Firstbourne can protect us from the Oni!”|
|— Chew Toy|
The Dragon Armor is an item that was once worn by the First Spinjitzu Master, before he left the First Realm. It was located in Firstbourne's Nest, until it was found by the Iron Baron and Wu. The latter briefly wore it before his body returned to his normal, old age.
Iron Baron takes possession of the armor and commands the Firstbourne to kill Wu. Wu tells Iron Baron that he had been lied to, and that the armor was not what allowed the First Spinjitzu Master to control the Firstbourne. But rather it was the purity of his heart, something Iron Baron lacks. Wu then puts on the armor and holds the Dragonbone Blade, becoming the Dragon Master. He rode on the Firstbourne on his way back to Ninjago.
Wu uses the armor and blade to fight against his brother, Garmadon, alongside Lloyd. However, Garmadon incapacitates Wu by blasting him off the edge of Borg Tower, leaving only the Dragonbone Blade for Lloyd to use. Wu wears the armor to assist Kai, Zane, Jay, Cole, and The Resistance take down the Colossus.
- The Dragonbone Blade is the only piece of the Dragon Armor to be in all of the sets that are in the Realm of Oni and Dragons and appears more than the other pieces of the armor in season.
- Despite the rumors surrounding it, the Dragon Armor doesn't have special powers.
- It is unknown what happened to it, possibly Master Wu kept it or stored it in Borg Tower Vaults or returned it together with the Firstbourne in Realm of Oni and Dragons.