1 Borderless common or uncommon 4 Commons 2 Nonlegendary uncommons 1 Legendary uncommon 1 Legendary uncommon (in 50% of boosters) or a nonlegendary rare or mythic rare 2 Wildcards, including rares, mythic rares, borderless rares, and borderless mythic rares 1 Legendary rare or mythic rare 1 Nonlegendary rare or mythic rare 1 Traditional foil card 1 Token/ad card or card from The List 1 Art card, with a gold-stamped artist signature in 10% of boosters
On the other hand, since the Limited Edition Alpha print run was so small, there were no more than 1,100 copies of each rare card printed, such as Black Lotus or Copy Artifact
You can learn more about the specific criteria for each number by reviewing the official PSA grading standards
In fact, similar issues arose more recently Corpse Knight Back during the weekend of the Magic 2020 prereleases, event judges worldwide were racing to explain to players that yes, the card says its a 2/3