Thunder Spark runs a '''"[[Hunder]]" Deck''', spearheaded by his "[[Number 91: Thunder Spark Dragon]]". He uses many [[effect]]s to [[swarm]] [[Level]] 4 monsters on his field in order to [[Xyz Summon]] the "[[Number]]", and uses cards like "[[Spirit Converter]]" to recycle its [[Xyz Material]]s and use its effect every [[turn]].
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{{Decklist|Deck
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|normal monsters =
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* [[Brohunder]]
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* [[Mahunder]]<ref group=Notes name=hunder>This card is an [[Effect Monster]] in the [[TCG]]/[[OCG]]. Although the card itself was not shown, it was presumably a [[Normal Monster]] in the manga.</ref>
* [[Number 91: Thunder Spark Dragon]]<ref group=Notes name=Numbers>This card was absorbed by [[Astral (manga)|Astral]] upon his loss against [[Yuma Tsukumo (manga)|Yuma Tsukumo]].</ref>
When Dueling, Spark wears no Duel Gazer, and his eyes don't change in any way. It is unknown if he could see the AR Vision normally (as he isn't a human), or if he just didn't see it.
