Historical Rules · 1 October 2009
Rule 112.6i
Official source text from the 1 October 2009 Rules release
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, unless that ability's trigger condition, or a previous part of that ability's cost or effect, specifies that the object is put into that zone. Example: Necrosavant says "{3}{B}{B}, Sacrifice a creature: Return Necrosavant from your graveyard to the battlefield. Activate this ability only during your upkeep." A player may activate this ability only if Necrosavant is in his or her graveyard.