Resources

Magic: The Gathering Comprehensive Rules Changes

Planar Chaos to Future Sight (Single Change View)

General changes

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

424.5.

If a cost includes a mana payment, the player paying the cost has a chance to play mana abilities. Paying the cost to play a spell or activated ability follows the steps in rules 409.1f-h.