Resources

Magic: The Gathering Comprehensive Rules Changes

Ravnica: City of Guilds to Guildpact (Single Change View)

General changes

Old rule (Ravnica: City of Guilds) New rule (Guildpact)

402.8.

Abilities function only while the permanent with the ability is in play unless the ability is a characteristic-setting ability that sets type, subtype, supertype, or color; an ability of an instant or sorcery; an additional cost; an alternative cost; or a play restriction. Abilities can also function in other zones if they state otherwise or if the ability can only trigger or be played in a zone other than the in-play zone. An ability whose cost or effect specifies that it moves the object it's on out of a particular zone functions only in that zone.

Example: You can play an ability with a cost that includes "Discard this card" only if the card is in your hand.

402.8.

Abilities of an instant or sorcery usually function only while the object is on the stack. Abilities of all other objects usually function only while that object is in play. The exceptions are as follows: