yugioh thor deck NORDIC DECK*THOR, LORD OF THE AESIR*VALKYRIE** Thor Lord of the Aesir

If you're on the fence, the presence of sideboard cards like these can be a great tiebreaker in favor of mulliganing

Pearl-Ear, Imperial Advisor Voltron decks are always popular, but Pearl-Ear, Imperial Advisor takes a different stance on embellishing your creatures with auras

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If a face-up Machine monster(s) you control is destroyed by battle or card effect: You can target 1 Machine monster in your GY

Regarding EX cards, there's nothing written on them about limiting them to one per deck so this rule from rulebook applies [1] : When you are building a deck, you can have only 4 copies of a card with the same name in it, except for basic Energy cards