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Magic: The Gathering Comprehensive Rules Changes

Masters Edition to Lorwyn (Single Change View)

General changes

Old rule (Masters Edition) New rule (Lorwyn)

Mana Ability

A mana ability is either activated or triggered. A mana ability doesn't go on the stack-it resolves immediately. See rule 411, "Playing Mana Abilities." A player may play an activated mana ability whenever he or she has priority and whenever a rule or effect asks for a mana payment. This is the only type of ability that can be played in the middle of playing or resolving a spell or ability. See rule 406, "Mana Abilities."

Mana Ability

A mana ability is either activated or triggered. A mana ability doesn't go on the stack-it resolves immediately. See rule 411, "Playing Mana Abilities." A player may play an activated mana ability whenever he or she has priority and whenever a rule or effect asks for a mana payment. This is the only kind of ability that can be played in the middle of playing or resolving a spell or ability. See rule 406, "Mana Abilities."