Are players able to rearrange the cards in their library at any time?

Players are not free to rearrange the cards in their library at any time, as this could interfere with the game's integrity. The rules indicate that players can only reorder their libraries under specific conditions, typically allowed by special abilities or spells that explicitly permit manipulation of cards in the library. This means that unless a player is using a special ability that allows them to look at or rearrange their library, they must keep their library in its original order.

Understanding this rule is crucial because libraries represent hidden information in the game, and their integrity must be maintained to ensure fair play. Players are actively encouraged to prevent any act that could lead to accidental knowledge of card order or influence future draws, which could disrupt the game's mechanics and strategic elements.