Magic: The Gathering Comprehensive Rules Changes - Future Sight to Core Set - Tenth Edition

Old rule (Future Sight)	New rule (Core Set - Tenth Edition)
506.3a. → 506.3. [Click to view all changes.]
506.3a. A player's deck in the subgame may have less than the minimum number of cards. If a player's deck contains less than seven cards, the player will lose the game as soon as it starts, even if he or she mulligans. (See rule 420, "State-Based Effects.")	506.3. Any rules regarding the size of a player's deck are ignored for the subgame. However, because each player draws seven cards when a game begins, any player with fewer than seven cards in his or her deck will lose the subgame when state-based effects are checked during the upkeep step of the first turn, regardless of any mulligans that player takes. (See rule 420, "State-Based Effects.")

Old rule (Future Sight)

New rule (Core Set - Tenth Edition)

506.3a. → 506.3. [Click to view all changes.]

506.3a.

A player's deck in the subgame may have less than the minimum number of cards. If a player's deck contains less than seven cards, the player will lose the game as soon as it starts, even if he or she mulligans. (See rule 420, "State-Based Effects.")

506.3.

Any rules regarding the size of a player's deck are ignored for the subgame. However, because each player draws seven cards when a game begins, any player with fewer than seven cards in his or her deck will lose the subgame when state-based effects are checked during the upkeep step of the first turn, regardless of any mulligans that player takes. (See rule 420, "State-Based Effects.")