User blog comment:CFDrewbert/webxoss tournament/@comment-204.83.117.100-20160111032844/@comment-27565452-20160111062742

Oh. Well, I'm not really a competitive player as well, though I do join tournaments and events, but its mainly to have fun and play against many different decks and opponents.

As for your question, probably just the banlist aka Mayu's room. Aside from that, you can pretty much use whatever cards you like to.