Historical Rules · 17 July 2015
Rule 706.1
Official source text from the 17 July 2015 Rules release
Some objects become or turn another object into a “copy” of a spell, permanent, or card. Some effects put a token onto the battlefield that’s a copy of another object. (Certain older cards were printed with the phrase “search for a copy.” This section doesn’t cover those cards, which have received new text in the Oracle card reference.)