Justin Poist [US] (5/5/4), Gardevoir ex 502
This is the list: Snowpoint Temple helps make Dialga G a tank and Conductive Quarry helps get Special Metals out of the diiscard pile
However, you can consider playing fewer than four copies of a card if: It gets worse in multiples (such as legendary creatures) It's only useful against certain matchups It's a win condition, and your control deck will have time to dig through the deck and find it You're stuck choosing between two cards which have equally strong, similar, but slightly different effects (you could play two of each) It's a slightly worse version of a card you have four copies of already, and you're including it because you want even more of that effect
You can find most of those cards in the soft glow treatment inspired by a futuristic neon aesthetic: There are 37 rares and six mythic rares with the soft glow treatment
Key Features One of the Egyptian God Cards Gains 1,000 Attack and Defense Points for every card in player's hand An archetype of DIVINE Beast Monster cards Reduces the Attack Points of an opponent's monster by 2,000 Points