Yubel uses a Sacred Beast Deck after she acquires the Sacred Beasts. Her Deck largely focuses around monsters with 0 ATK, and boosts the Summoning speed of the Sacred Beasts by sending them to the Graveyard to take advantage of their effects and Special Summon them from the Graveyard. She also has the option of fusing them to Summon "Chaos Phantasm Armityle", their fused form.
While possessing Jesse's body, she uses two Decks as well: She uses an "Advanced Crystal Beast" Deck, which she creates by tainting Jesse's true Deck, and it is similar to his in terms of tactics with a heightened focus on preventing battle damage. Via the damage prevention effect of "Advanced Dark", she can boost the Summoning speed of "Rainbow Dark Dragon" thanks to the "Advanced Crystal Beasts" that the effect sends to the Graveyard.
Yubel also uses another Sacred Beast Deck, varying from the Deck she used while possessing Marcel. This new Deck includes cards that can duplicate themselves and help her meet each condition for Summoning "Uria", "Hamon", and "Raviel" before fusing them to Summon "Chaos Phantasm Armityle" yet again, as opposed to ignoring their Summoning conditions. As a backup strategy in this Deck, she stalled for time until she could Summon "Yubel" and damage her opponent in combination with "Torch Golem".
In her final Duel against Jaden, Yubel runs a Fiend/Plant Deck, focused on the Summoning of her own card and its upgraded forms, as well as monsters that are Summoned under her opponents' control so she can damage her opponent. As a backup strategy, she uses the effect of "Spell Chronicle", which lets her remove key cards in her Deck from play, and later forces her opponent to add them to her hand.
The hidden machination of this Deck is the Summoning of "Super Fusion God", a monster which has the ability to combine or annihilate the twelve dimensions. Its Summoning requires one monster of each Level, from 1 to 12, by using "Super Polymerization". The only way to achieve this is the use of "Chain Material", which lets the controller to access the field, hand, Deck, and Graveyard for Fusion Material Monsters.
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