Magic: The Gathering Comprehensive Rules Changes - Planar Chaos to Future Sight

Old rule (Planar Chaos)	New rule (Future Sight)
203.1a. [Click to view all changes.]
203.1a. Lands normally have no mana cost. Tokens have no mana cost unless the effect that creates them specifies otherwise. A copy of an object copies that object's mana cost.	203.1a. A copy of an object copies that object's mana cost. See rule 503, "Copying Objects."

Old rule (Planar Chaos)

New rule (Future Sight)

203.1a.

Lands normally have no mana cost. Tokens have no mana cost unless the effect that creates them specifies otherwise. A copy of an object copies that object's mana cost.

203.1a.

A copy of an object copies that object's mana cost. See rule 503, "Copying Objects."