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Magic: The Gathering Comprehensive Rules Changes

Planar Chaos to Future Sight (Single Change View)

General changes

Old rule (Planar Chaos) New rule (Future Sight)

Cost

Playing spells and activated abilities requires paying a cost. Most costs are paid in mana, but costs may also include paying life, tapping or sacrificing permanents, discarding cards, and so on. A player can't pay a cost unless he or she has the necessary resources to pay it fully. For example, a player with only 1 life can't pay a cost of 2 life, and a permanent that's already tapped can't be tapped to pay a cost. See rule 203, "Mana Cost and Color," and rule 403, "Activated Abilities."

Cost

Playing spells and activated abilities requires paying a cost. Most costs are paid in mana, but costs may also include paying life, tapping or sacrificing permanents, discarding cards, and so on. A player can't pay a cost unless he or she has the necessary resources to pay it fully. For example, a player with only 1 life can't pay a cost of 2 life, and a permanent that's already tapped can't be tapped to pay a cost. See rule 424, "Costs," rule 203, "Mana Cost and Color," and rule 403, "Activated Abilities." Some spells and abilities have no cost. In such instances, the cost can't be paid.