This is a game that has been rumored in the Club Penguin Card Jitsu Series for a while. Many think that it is a real game. It is thought to be the final battle for Card Jitsu. It is rumored to be released in 2013 or 2014.
- The Card-Jitsu Shadow items were first seen in swf files.
- Moderators like Ninja and Happy77 have been seen wearing it.
- A Card-Jitsu shadow power card can be used, which features a shadow ninja using his shadow to scare away their opponent.
- At the end of Card-Jitsu Snow, Tusk runs off into the shadows, hinting at the possibility of Card-Jitsu Shadow.