Magic: The Gathering Comprehensive Rules Changes - Core Set - Ninth Edition to Ravnica: City of Guilds

Old rule (Core Set - Ninth Edition)	New rule (Ravnica: City of Guilds)
Alternative Cost [Click to view all changes.]
Alternative Cost The rules text of some spells reads, "You may [action] rather than pay [this object's] mana cost," or include the phrase, "you may play [this object] without paying its mana cost." These are alternative costs. Only one such alternative cost can be applied to any one spell. Other spells and abilities that ask for a spell's mana cost still see the actual mana cost, not what was paid to play the spell. If an effect requires paying additional costs to play a spell, it still applies to the alternative cost. See rule 409, "Playing Spells and Activated Abilities."	Alternative Cost The rules text of some spells reads, "You may [action] rather than pay [this object's] mana cost," or includes the phrase, "you may play [this object] without paying its mana cost." These are alternative costs. Only one such alternative cost can be applied to any one spell. Other spells and abilities that ask for a spell's mana cost still see the actual mana cost, not what was paid to play the spell. If an effect requires paying additional costs to play a spell, it still applies to the alternative cost. See rule 409, "Playing Spells and Activated Abilities."

Old rule (Core Set - Ninth Edition)

New rule (Ravnica: City of Guilds)

Alternative Cost [Click to view all changes.]

Alternative Cost

The rules text of some spells reads, "You may [action] rather than pay [this object's] mana cost," or include the phrase, "you may play [this object] without paying its mana cost." These are alternative costs. Only one such alternative cost can be applied to any one spell. Other spells and abilities that ask for a spell's mana cost still see the actual mana cost, not what was paid to play the spell. If an effect requires paying additional costs to play a spell, it still applies to the alternative cost. See rule 409, "Playing Spells and Activated Abilities."

Alternative Cost

The rules text of some spells reads, "You may [action] rather than pay [this object's] mana cost," or includes the phrase, "you may play [this object] without paying its mana cost." These are alternative costs. Only one such alternative cost can be applied to any one spell. Other spells and abilities that ask for a spell's mana cost still see the actual mana cost, not what was paid to play the spell. If an effect requires paying additional costs to play a spell, it still applies to the alternative cost. See rule 409, "Playing Spells and Activated Abilities."