yugioh math deck Yu-Gi-Oh! Mathmech Circular - POTE-EN028 - Super Rare MATH PROVES The Ultimate Yugioh

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Because they're also machine type monsters, cards such as "Magnetic Mosquito" and "System Down" also hurt them (especially System Down, as it banishes Machines), and are the most common, exploitable, and obvious countermeasures to this deck since "System Down" can eliminate the presence of all Machine monsters on the field as well as those in the Graveyard (which the "Cyber Dragon" archetype are heavily reliant on as most monsters within it allow them to share it's name)

The release was far ahead of what was intended, due to Topps also releasing a Pokemon set in the early summer

(2021-07-23) A player may only have one dungeon in the command zone at a time

In fact, that was arguably the block that helped recontextualize all three of these cards