These cards represent the mana, or magical energy, that players use to cast spells and activate abilities
If, for example, a Dromai deck shows marks of use only on sleeves containing double-faced cards, then that can be a reason to suspect potential cheating, even if the reason for the additional wear on the sleeves is benign
Creatures with defender generally have low power and high toughness
Ensure the deck box can comfortably store sleeved cards, especially if you have a large collection or play unique formats like Commander
More Interaction (discard and bounce), Fewer Lands as the game likely will go long
Put those creature cards onto the battlefield, then shuffle the rest into your library