In addition, you can transform into Kamen Rider Blades Lion Senki Peter by inserting the DX Peter Fantasista Wonder Ride Book (sold separately) in the Swordriver while the Lion Senki Wonder Ride Book is still in the Swordriver and then pulling out the Suiseiken Nagare. The included Lion Senki Wonder Ride Book can be played on its own by pressing it, playing the name of the book. If you open the page, it will play the story sound.
DX Suiseiken Nagare Emblem & Lion Senki Wonder Ride Book cost 2,750 yen and is now available. In addition, you can purchase it in the single set with the DX Seiken Swordriver for 10,428 yen.