Ninjago: Season 2

The second season begins with the aftermath of the Ninja's battle with the Serpentine. After defeating the Great Devourer, Lord Garmadon has treacherously fled and deserted Wu and the Ninja with the Golden Weapons, now plotting against them and putting his evil plans of conquering the city in motion, having taken command of the Serpentine. Gathering the remaining Serpentine under his command, Lord Garmadon travels to the Golden Peaks. At the Golden Peaks, birthplace of the weapons, he unites the four weapons and forges them into an even more powerful Mega Weapon.