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

Old rule (Planar Chaos)	New rule (Future Sight)
409.4a. [Click to view all changes.]
	409.4a. If an effect allows a card that's prohibited from being played to be played face down, and the face-down spell would not be prohibited, that spell can be played face down. See rule 504, "Face-Down Spells and Permanents."

Old rule (Planar Chaos)

New rule (Future Sight)

409.4a.

If an effect allows a card that's prohibited from being played to be played face down, and the face-down spell would not be prohibited, that spell can be played face down. See rule 504, "Face-Down Spells and Permanents."