This was a new design where either you could keep Kain and keep attacking to draw cards and lose life or give it to an opponent to force them to take damage
BT5-084 R Digimon Lv.6 Diaboromon Color White Cost 11 DP 11000 Digivolve Cost 1 Black 3 from Lv.5 Form Mega Attribute Unknown Type Unidentified Card Text 1 [Effect] [When Digivolving] You may play 1 [Diaboromon] Token without paying its memory cost
So much so that these tutorials, combined perhaps with the viewing of a few of the Yu-Gi-Oh anime's episodes on Cartoon Network, would be just enough to give total newcomers access to this vast gaming subculture
This is incredibly easy for the deck to do because of its incredibly powerful Rank 4 boss monster, Brotherhood of the Fire Fist - Tiger King, which can make the opponent unable to set up if they do not have handtraps to set this card's powerful effects
Being such a limited card only awarded to the best players makes this the highest rarity available for EmperorGreymon
If the image on the back is just a solid colour, it's likely a fake