Historical Rules · 18 June 2010
Rule 201.4a
Official source text from the 18 June 2010 Rules release
If an ability grants another ability to an object, and that second ability refers to that first ability's source by name, the name refers only to the specific object that is that first ability's source, not to any other object with the same name. Example: Saproling Burst has an ability that reads "Remove a fade counter from Saproling Burst: Put a green Saproling creature token onto the battlefield. It has 'This creature's power and toughness are each equal to the number of fade counters on Saproling Burst.'" The ability granted to the token only looks at the Saproling Burst that created the token, not at any other Saproling Burst on the battlefield.