Red Card

The Red card was used in episode 50 of Digimon Tamers. This card allows the Tamers to enter the D-Reaper, by changing their digital makeup. The card has a unique algorithim created by Shibumi.

Links
http://www.youtube.com/watch?v=RnU5K2v8e7g

This card had a defect when the Digimon were about to defeat the D-Reaper completely the effect of the card which has made the Digimon returning to the rookie level.