The leader of the Forbidden Five, Rox, and a Spectral Dragonian Warrior have invaded the Merged Lands. Join forces with Arin and Rogue to fight back! You must attach Rogue’s mech to the back of the first-ever NINJAGO® mech robot dragon and create an awesome Mech Dragon Rider to swoop into battle. Now with this combined power and your arsenal of weapons you can triumph over the forces of evil!