Promotional cards could be acquired in many ways: buying magazines or DVDs, or attending tournaments or special events.

This instantly became one of the most sought after cards in the game when it was first revealed and a sold for over $1,000 on eBay prior to release.

This one copy was placed on eBay by Score Entertainment to increase the hype for the upcoming events and tournament prizes, but the card was never widely released to the public as planned due to unforeseen complications.

In November 2011, the initial Season 4 Blu-ray release by Funimation contained a reprinted, non-foil copy of "The Dark One", printed by Panini, edited to allow use by the casual player.

There are also a select few cards that allow one to win the game after performing a set amount of conditions.

The player selects four characters from their deck and chooses one to place in the Arena section of the field; this one will fight the first match.

The only time the player will pay costs is when the attached cards are flipped face-up on either the Sidelines or while entering the Arena.

Attacks are done in this order, to prevent confusion: Once a character has taken four points of damage (thus returning it to its original position), both fighters are moved off the main playing field, and the winner is placed face-up and the loser face-down.

One of the reasons was that each subsequent expansion of cards greatly overpowered the previous sets (see power creep).

Quiroz, then head designer quit the game due to creative differences with the playtesting and development team.

When brought to the attention of the tournament judge, Scott Sager, the claims were immediately dismissed.