However, in the last Shadow Turbo Duel that occurred between Yusei, Jack and Crow versus [[Rex Goodwin]], Goodwin remained at the top of altar of the [[Stairway to the Dragon Star]], while Yusei, Jack and Crow drove their Duel Runners on the track formed by Goodwin's Condor geoglyph. This is the only Turbo Duel so far in which someone is not on a [[Duel Runner]] or a [[Duel Board (5D's)|Duel Board]], but as with a Duel Board, as long as someone has a "[[Speed World (anime)|Speed World]]" card they can use a Duel Disk.