Yuma Tsukumo's Decks

Yuma Tsukumo's Deck has been influenced greatly by the "Number" cards, while focusing on his strategy to Summon his "Syllable" monsters to perform a Xyz Summon.

When Yuma Dueled Ryoga Kamishiro, Astral eventually appeared alongside him, giving him access to the powerful "Numbers". When Astral is fighting with Yuma, he can also upgrade his ace monster "Number 39: Utopia" in "Chaos Number 39: Utopia Ray" when they believe in their possibilities.

First Syllable
In the beginning of the series, Yuma's Deck is filled with the "Syllable" cards, a series of cards which have repetitive names e.g. Gogogo (some of his monsters can only be "Syllables" with their Japanese pronunciations, e.g. "Shsdow Lizard" - "Kagetokage"). It is supported with a lot of ATK increasing cards such as "Wonder Wand", and Trap Cards which protect his monsters from destruction such as "Bye Bye Damage". It contains some support for his "Gagaga" monsters later on.

Yuma originally played a different Deck. He decided to use his father's Deck in his first Duel against Ryoga Kamishiro. After that Duel, he keeps using this Deck instead of his original one.

Second Syllable
After his time at the Duel Lodge, Rokujuro gave Yuma the "Duel Lodge secret Deck". According to Rokujuro, the Deck is appropriate for Yuma and should answer his feelings. Tetsuo Takeda believes Yuma can improve his Deck with this one for the WDC. Yuma combined elements from both this Deck and his first Deck into a single Deck. He still has access to the "Number" cards.

Accessible Numbers
Yuma's Deck is constantly being upgraded by obtaining "Number" cards from various Duelists he faces. When Yuma defeats "Number" holders, Astral absorbs their "Numbers", giving Yuma access to them. Yuma only has access to them while Astral is fighting alongside him in a Duel. Though he has access to them, he has only played three of the base "Numbers" alongside one upgraded form.

Statue
In order to improve his skills, Yuma Dueled Rokujuro in a Statue Duel. He used a Statue Deck consisting of "Statue" versions of "Dark Magician" monsters and other wooden cards from the latter's Duel Lodge card collection.

Manga
Yuma's manga Deck is quite similar to his Anime Deck, as it features both "Syllable" monsters and the "Number" cards.