The Firstbourne is a dragon from Ninjago: Masters of Spinjitzu.
The Firstbourne, as its name implies, is thought to be the first of all dragons and mother to subsequent generations of the species.
In "March of the Oni", the Firstbourne-ridden by Faith-attempts to fight off an Oni attack against the former Dragon Hunters. When the Hunters and its fellow Dragons are all subdued, it travels to Ninjago with Faith. It collapses at the foot of the Monastery of Spinjitzu's mountain peak, and Wu and the Ninja rush to check on it. Later, after the defeat of the Oni, the recovered Firstbourne flies in the air above the monastery.