I always use the shuffle button to test my opening hands before I test the deck in a duel
Fit cards snugly, might not be for you if you regularly take cards out of sleeves or fear the snug fit might damage your cards
Super Conductor Tyranno X LIGHT Level 8 [ Dinosaur / Effect ] ATK 3300 DEF 1400 Once per turn: You can Tribute 1 monster
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Once the Xyz monsters are in play, this is where things get very interesting
There is a limit of ATK or less, but since it's Rank 4 and doesn't specify materials, it's easy to use, so it's probably worth adopting even if you spend extras