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)
411.3. [Click to view all changes.]
411.3. Triggered mana abilities trigger when an activated mana ability is played. These abilities resolve immediately after the mana ability that triggered them, without waiting for priority. If an activated or triggered ability produces both mana and another effect, both the mana and the other effect resolve immediately. Example: An enchantment reads, "Whenever a player taps a land for mana, that player adds one mana of that type to his or her mana pool.." If a player taps lands for mana while playing a spell, the additional mana is added to the player's mana pool immediately and can be used to pay for the spell.	411.3. Triggered mana abilities trigger when an activated mana ability is played. These abilities resolve immediately after the mana ability that triggered them, without waiting for priority. If an activated or triggered ability produces both mana and another effect, both the mana and the other effect resolve immediately. Example: An enchantment reads, "Whenever a player taps a land for mana, that player adds one mana of that type to his or her mana pool." If a player taps lands for mana while playing a spell, the additional mana is added to the player's mana pool immediately and can be used to pay for the spell.

Old rule (Core Set - Ninth Edition)

New rule (Ravnica: City of Guilds)

411.3.

Triggered mana abilities trigger when an activated mana ability is played. These abilities resolve immediately after the mana ability that triggered them, without waiting for priority. If an activated or triggered ability produces both mana and another effect, both the mana and the other effect resolve immediately.

Example: An enchantment reads, "Whenever a player taps a land for mana, that player adds one mana of that type to his or her mana pool.." If a player taps lands for mana while playing a spell, the additional mana is added to the player's mana pool immediately and can be used to pay for the spell.

411.3.

Example: An enchantment reads, "Whenever a player taps a land for mana, that player adds one mana of that type to his or her mana pool." If a player taps lands for mana while playing a spell, the additional mana is added to the player's mana pool immediately and can be used to pay for the spell.