Are double sleeved cards legal for official Yu Gi Oh events? Magic & Yu Gi Oh! Structure Decks Lair of Darkness So, I made my first double sleeved Deck today. Honestly, didn't expect it to be taller than a deck of single sleeved cards, but probably SHOULD have. : r mtg 1Select the Right Surface: Warm, flat surface: To soften the sleeve material and allow it to flatten more easily, place your sleeved cards on a warm surface. (Avoid using high heat, as Lair of Darkness YGOPRODeck