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When this card is Normal Summoned:
You can target 1 Level 4 Cyberse monster in your GY;
Special Summon it, but it cannot activate its effects.
A "Mathmech" monster that was Synchro or Xyz Summoned using this card on the field as material gains the following effect.
● Once per turn, during the turn this card was Special Summoned, when your opponent activates a card or effect (Quick Effect):
You can negate that effect.
You can only use each effect of "Mathmech Diameter" once per turn.