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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)

Exchange

A spell or ability may instruct two players to exchange something (for example, life totals or control of two permanents) as part of its resolution. When such a spell or ability resolves, if it can't exchange the chosen things, it has no effect on them.

Example: If a spell attempts to exchange control of two target creatures but one of those creatures is destroyed before the spell resolves, the spell does nothing to the other creature. Or if a spell attempts to exchange control of two target creatures but both of those creatures are controlled by the same player, the spell does nothing to the two creatures. When control of two permanents is exchanged, each player simultaneously gains control of the permanent that was controlled by the other player. When life totals are exchanged, each player gains or loses the amount of life necessary to equal the other player's previous life total. Replacement effects may modify these gains and losses, and triggered abilities may trigger on them. Some spells or abilities may instruct a player to exchange cards in one zone with cards in a different zone (for example, cards removed from the game and cards in a player's hand). These spells and abilities work the same as other "exchange" spells and abilities, except they can exchange the cards only if all the cards are owned by the same player. If a spell or ability instructs a player to simply exchange two zones, and one of the zones is empty, the cards in the zones are still exchanged.

Exchange

A spell or ability may instruct two players to exchange something (for example, life totals or control of two permanents) as part of its resolution. When such a spell or ability resolves, if it can't exchange the chosen things, it has no effect on them.

Example: If a spell attempts to exchange control of two target creatures but one of those creatures is destroyed before the spell resolves, the spell does nothing to the other creature. Or if a spell attempts to exchange control of two target creatures but both of those creatures are controlled by the same player, the spell does nothing to the two creatures. When control of two permanents is exchanged, each player simultaneously gains control of the permanent that was controlled by the other player. When life totals are exchanged, each player gains or loses the amount of life necessary to equal the other player's previous life total. Replacement effects may modify these gains and losses, and triggered abilities may trigger on them. Some spells or abilities may instruct a player to exchange cards in one zone with cards in a different zone (for example, cards removed from the game and cards in a player's hand). These spells and abilities work the same as other "exchange" spells and abilities, except they can exchange the cards only if all the cards are owned by the same player. If a card in one zone is exchanged with a card in a different zone, and either of them is attached to an object, that card stops being attached to that object and the other card becomes attached to that object. If a spell or ability instructs a player to simply exchange two zones, and one of the zones is empty, the cards in the zones are still exchanged.