Rules · PlanesAdvisor

607.5 If an object acquires a pair of linked abilities as part of the same effect, the abilities will be similarly linked to one another on that object even though they weren’t printed on that object. They can’t be linked to any other ability, regardless of what other abilities the object may currently have or may have had in the past. Example: Arc-Slogger has the ability “{R}, Exile the top ten cards of your library: This creature deals 2 damage to any target.” Sisters of Stone Death has the ability “{B}{G}: Exile target creature blocking or blocked by Sisters of Stone Death” and the ability “{2}{B}: Put a creature card exiled with Sisters of Stone Death onto the battlefield under your control.” Quicksilver Elemental has the ability “{U}: This creature gains all activated abilities of target creature until end of turn.” If a player has Quicksilver Elemental gain Arc-Slogger’s ability, activates it, then has Quicksilver Elemental gain Sisters of Stone Death’s abilities, activates the exile ability, and then activates the return-to-the-battlefield ability, only the creature card Quicksilver Elemental exiled with Sisters of Stone Death’s ability can be returned to the battlefield. Creature cards Quicksilver Elemental exiled with Arc-Slogger’s ability can’t be returned.

607.5a If an object gains an ability that refers to a choice, but either (a) doesn’t copy that ability’s linked ability or (b) does copy the linked ability but no choice is made for it, then the choice is considered to be “undefined.” If an ability refers to an undefined choice, that part of the ability won’t do anything. Example: Voice of All enters the battlefield and Unstable Shapeshifter copies it. Voice of All reads, in part, “As this creature enters, choose a color.” and “This creature has protection from the chosen color.” Unstable Shapeshifter never had a chance for a color to be chosen for it, because it didn’t enter the battlefield as Voice of All so it doesn’t gain a protection ability. Example: A Vesuvan Doppelganger enters the battlefield as a copy of Voice of All, and the Doppelganger’s controller chooses blue. Later, the Doppelganger copies Quirion Elves, which has the ability, “{T}: Add one mana of the chosen color.” Even though a color was chosen for the Doppelganger, it wasn’t chosen for the ability linked to the mana ability copied from the Elves. If that mana ability of the Doppelganger is activated, it will not produce mana.