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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)

Affinity

Affinity is a static ability that functions while the spell is on the stack. "Affinity for [text]" means "This spell costs you {1} less to play for each [text] you control." The affinity ability reduces only generic mana costs. It doesn't reduce how much colored mana you have to pay for a spell. It can't reduce the cost to play a spell to less than 0. See rule 502.31, "Affinity."

Affinity

Affinity is a static ability that functions while the spell is on the stack. "Affinity for [text]" means "This spell costs you {1} less to play for each [text] you control." The affinity ability reduces only generic mana costs. It doesn't reduce how much colored mana you have to pay for a spell. See rule 502.31, "Affinity."