In Episode 7, Baku Omori offers to rebuild Tetsuya's deck. This new deck being focused on making the most out of Asmodai's powerful abilities by maximizing it and adding cards to increase his hand advantage such as Nice One! and cards that allow him to recover Asmodai no matter how many times its destroyed. Once the opponent's life is 3 or lower, he finishes them off with his signature Impact, Diabolical Hardcore!
"Come on, move! Dancing Demon! It's time to groove. Let's luminize it! Yo!"
He then uses a new deck for the Gaen Cup. Now including more variety of Size 1 monsters to attack directly more times per turn after Asmodai destroys the Center monster. He includes Solomon's Great Barrier to turn his Size 2 monsters into Size 1s to have more powerful attackers while still being able to have 3 monsters on the field and uses the Great Spell cards to bring more Size 1 monsters and either do to 6 attacks in one turn and/or get rid of the opponent's field instantly. He even used this deck to defeat Death Shido after Gao was exhausted from catching those illegal monsters. During his fight against a possessed Baku, he added some Asmodai cards to his deck.
"A millennial kingdom, Yo! Where you can play for ages! Luminize! Devil's Millennium!"