Resources

Magic: The Gathering Comprehensive Rules Changes

Eventide to Shards of Alara (Single Change View)

General changes

Old rule (Eventide) New rule (Shards of Alara)

421.3.

If a loop contains optional actions controlled by two players and actions by both of those players are required to continue the loop, the first player (or the first involved player after the active player in turn order) chooses a number. The other player then has two choices. He or she can choose a lower number, in which case the loop continues that number of times plus whatever fraction is necessary for the active player to "have the last word." Or he or she can agree to the number the first player chose, in which case the loop continues that number of times plus whatever fraction is necessary for the second player to "have the last word." (Note that either fraction may be zero.) This sequence of choices is extended to all applicable players if there are more than two players involved.

Example: In a two-player game, one player controls a creature with the ability "{0}: [This creature] gains flying," and another player controls a permanent with the ability "{0}: Target creature loses flying." The "infinity rule" ensures that regardless of which player initiated the gain/lose flying ability, the nonactive player will always have the final choice and therefore be able to determine whether the creature has flying. (Note that this assumes that the first player attempted to give the creature flying at least once.)

421.3.

If a loop contains optional actions controlled by two players and actions by both of those players are required to continue the loop, the active player (or, if the active player is not involved, the first involved player after the active player in turn order) chooses a number. The other player then has two choices. He or she can choose a lower number, in which case the loop continues that number of times plus whatever fraction is necessary for the first player to "have the last word." Or he or she can agree to the number the first player chose, in which case the loop continues that number of times plus whatever fraction is necessary for the second player to "have the last word." (Note that either fraction may be zero.) This sequence of choices is extended to all applicable players if there are more than two players involved.

Example: In a two-player game, one player controls a creature with the ability "{0}: [This creature] gains flying," and another player controls a permanent with the ability "{0}: Target creature loses flying." The "infinity rule" ensures that regardless of which player initiated the gain/lose flying ability, the nonactive player will always have the final choice and therefore be able to determine whether the creature has flying. (Note that this assumes that the first player attempted to give the creature flying at least once.)