How do you launch the invader ship on astro knights?

You have to get anew fuel vile from a dungeon under the library in the castle. Get a Library card look at it, click McM in the library it will have stairs yu go down. get the chess on the floor and...

first go to the library press McM sign go down stairs get cheese press on lever get out of library go left to maids room use cheese then go to end of room click on paper that moves around go to mill...

You have to get a new fuel rod for the saucer and some coordinates to fly to.(see the related questions)

HOW TO START THE SPACESHIP:You go in to the space ship you have to have the fule pod thing and you put in the cordnets so first is Y:56 then X:52 the it starts it and you go to the moon.from the moon...

While Mordred's hovercraft runs on manure, the saucer is advanced technology. It has a green fuel rod that has been broken. You need to get a replacement fuel rod. For the procedure, see the related...