You're hard to answer, not impossible
You can use any card as long as it is the same size as a regular Magic card (2.5 inches by 3.5 inches)
Count up the number of cards you have of each color
Sure, you can keep making Cat tokens over and over again, but if you have tokens of another artifact or a different powerful creature, you can quickly make an army of massive creatures
Overlord of the FloodpitsOverlord of the Floodpits (22,362 Inclusions, 1.51% of 1,481,337 Decks) All of this "copies of the copies" nonsense made me forget for a moment that there were more normal time counter cards on this list, as well
As with Umbral Collar Zealot, the fact that this keys off artifacts (while it also makes one with fabricate) opens up so many more opportunities to play it