After visiting Sheppard in the mountains, Zane acquires the "Cyberdark" Deck. It was also known as the Cyber Style Tails Deck ("Underworld Deck" in the dub). It represented the dark and passive Yin, that was sealed away in his former teacher's dojo. He combined cards from both Decks into a single Deck, but continued to disrespect his "Cyber Dragons", throwing away all related cards into his Graveyard to strengthen his new servants.
In the Dimension World arc, Zane makes uses of his "Cyber Dragons" in combination with his "Cyberdarks", but values them more than he did in season 2. He uses this Deck in his quest to find a final opponent to give him one last great Duel.
In the Darkness arc, Zane is revived, but is restricted to a wheelchair due to his heart condition. Despite this, he accepts a Duel request from Psycho Style Duelist Makoto Inotsume. He collapses midway through the Duel. Syrus takes up the Deck and Duels Inotsume himself, combining the Deck with his own. Zane allows him to keep the Deck afterward, knowing that Syrus would respect and grow with the Deck rather then disrespect it, which would suppress the debilitating powers of the "Cyberdarks".