Because doing this fluff for Phoenix of the Roaring Flames was not annoying at all.
High Magic – Double Accel / High Magic – Double Acceleration
This is a card played by Yuga all the way back in episode 1 of SEVENS! Needless to say its way overdue.
A card played by Luke in episode 73. No relation to the Duel Links Structure Deck of the same name (I think).
Kakugo / Resolve
This is a sui generis card based on episode 24 (which is titled Resolve in Japanese), where Luke, Romin, and Gakuto simultaneously Duel 3 holograms of Otes. Dragias, Esperade, and Kimeruler were the monsters they used for the final blows.
Saikou no Riff (Colorful Light Riff) / Shining Superstar Riff
This one is a reference to episode 3, where Romin first plays Prima Guitarna in a Deck made of Yuga’s spare cards (remember the good old times when she claimed she had no interest in Dueling?), hence the conspicously non-Psychic monsters with her. Specifically, its a pun on her boast of being about to give Yuga the greatest riff (also pronounced “saikou no riff”) before riffing all over him.
And finally this… truthfully, idk if this is a reference to anything specific, heh.