Ninjago: Masters of Spinjitzu
Long before time had a name, the realm of Ninjago was created by the First Spinjitzu Master, using the four weapons of Spinjitzu. When he passed away, his two sons swore to protect the land and the sacred weapons. However, the oldest, Garmadon, succumbed to the darkness within him when he battled his brother, Wu, in an attempt to steal the weapons for himself, forcing the youngest to strike him down into the Underworld. In the wake of his brother's descent, Wu hid the weapons, giving the map to an old blacksmith friend to hide. With the weapons safe at last, Wu then vowed to recruit the next generation of elemental fighters. Years later, the blacksmith's son, Kai, is on a mission to save his sister from Lord Garmadon's undead Skulkin forces, and is recruited by Sensei Wu along with three other teenage boys to wield the Golden Weapons and defend the world from evil.
Ninjago Masters of Spinjitzu S00E01 - Way of the Ninja.mp4Way of the Ninja/ The Golden Weapons
Sibling blacksmiths Kai and Nya meet a mysterious old man Master Wu, who seeks their help against the threat of his brother Garmadon and his new army of Skulkin who dominate the Underworld. After Nya is abducted by the Skulkin and their leader, Samukai, Kai joins Wu's three other students, Jay, Zane, and Cole, in the hopes of rescuing her.
Ninjago Masters of Spinjitzu S00E02 - King of Shadows.mp4King of the Shadow/ Weapons of Destiny
The ninja successfully recover three of the four Golden Weapons from their guardian dragons, leaving only the Sword of Fire. Garmadon uses Nya to lure Kai into an ambush at the Fire Temple, while Samukai steals the golden weapons from the other ninja. Wu saves Kai and Nya from Garmadon's shadow, then takes the Sword of Fire into the Underworld to keep it separated from the other Golden Weapons.