There are just some confusing topics here. Why does Firewall Dragon appear so late into the series (correct me if I'm wrong) but wasn't Decode Talker, Yusaku's previous ace? What took Firewall Dragon so long to appear? I love it's design. I haven't seen the series, only on amv's. Link summoning is pretty cool to watch happen. And this is taking place in a virtual world right? Personally I thought they would bring back the deck master rule once or twice in a duel. (Jk but it's a thought.)

Update II
From watching Vrainz amv's/reviews. Vrainz looks to be a pretty great series so far, personal favoritw characters are Yusaku/Playmaker (of course), Varis/Revolver, Spectre, Blood Shepard, Aoi/Blue Angel/Girl/Maiden,

The Ignis idea is pretty great, one of each attribute, plus with that thought, shouldn't there be a Divine Ignis? (Example Lighting absorbing Windy, Earth (maybe Aqua and Flame) then turns the Divine attribute?