Historical Rules · 5 February 2021
Rule 706.9b
Official source text from the 5 February 2021 Rules release
Some copy effects modify a characteristic as part of the copying process. The final set of values for that characteristic becomes part of the copiable values of the copy. Example: Copy Artifact is an enchantment that reads, “You may have Copy Artifact enter the battlefield as a copy of any artifact on the battlefield, except it’s an enchantment in addition to its other types.” It enters the battlefield as a copy of Juggernaut. The copiable values of the Copy Artifact now match those of Juggernaut with one modification: its types are now artifact, creature, and enchantment.