Number 20X

"Number 20X" is an archetype of Xyz Monsters, as well as the sub-archetype of the "Numbers". There are nine members of the archetype, plus their chaos forms. Most of their members are Rank 4 Xyz monsters, while the other two are Rank 8 monsters, and only "Number 208: Infector Virus Master" is a Rank 2 monster. They are practically related to the "Odd-Eyes" and "Xyz Dragon" archetype due to their ultimate form "CXyz Doomsday Zarc Emperor Dragon" required their chaos forms.

Playstyle
Since they are also "Number" cards, cards such as "" would help them well. Since all of them are Xyz Monsters, cards such as "" would support these cards as well.