Magic: The Gathering Comprehensive Rules Changes - Ravnica: City of Guilds to Guildpact

Old rule (Ravnica: City of Guilds)	New rule (Guildpact)
413.2f. [Click to view all changes.]
413.2f. If an effect requires information from the game (such as the number of creatures in play), the answer is determined only once, when the effect is applied. The effect uses the current information of a specific permanent if that permanent is still in play, or of a specific card in the stated zone; otherwise, the effect uses the last known information the object had before leaving that zone. The exception is that static abilities can't use last known information; see rule 412.5. If the ability text states that an object does something, it's the object as it exists (or most recently existed) that does it, not the ability.	413.2f. If an effect requires information from the game (such as the number of creatures in play), the answer is determined only once, when the effect is applied. The effect uses the current information of a specific permanent if that permanent is still in play, or of a specific card in the stated zone; otherwise, the effect uses the last known information the object had before leaving that zone. There are two exceptions. If an effect deals damage divided among some number of creatures or players, the amount and division were determined as the spell or ability was put into the stack; see rule 402.6. Also, static abilities can't use last known information; see rule 412.5. If the ability text states that an object does something, it's the object as it exists (or most recently existed) that does it, not the ability.

Old rule (Ravnica: City of Guilds)

New rule (Guildpact)

413.2f.

If an effect requires information from the game (such as the number of creatures in play), the answer is determined only once, when the effect is applied. The effect uses the current information of a specific permanent if that permanent is still in play, or of a specific card in the stated zone; otherwise, the effect uses the last known information the object had before leaving that zone. The exception is that static abilities can't use last known information; see rule 412.5. If the ability text states that an object does something, it's the object as it exists (or most recently existed) that does it, not the ability.

413.2f.

If an effect requires information from the game (such as the number of creatures in play), the answer is determined only once, when the effect is applied. The effect uses the current information of a specific permanent if that permanent is still in play, or of a specific card in the stated zone; otherwise, the effect uses the last known information the object had before leaving that zone. There are two exceptions. If an effect deals damage divided among some number of creatures or players, the amount and division were determined as the spell or ability was put into the stack; see rule 402.6. Also, static abilities can't use last known information; see rule 412.5. If the ability text states that an object does something, it's the object as it exists (or most recently existed) that does it, not the ability.