Historical Rules · 1 February 2010
Rule 603.3
Official source text from the 1 February 2010 Rules release
Once an ability has triggered, its controller puts it on the stack as an object that's not a card the next time a player would receive priority. See rule 115, "Timing and Priority." The ability becomes the topmost object on the stack. It has the text of the ability that created it, and no other characteristics. It remains on the stack until it's countered, it resolves, or an effect moves it elsewhere.