In the OCG, Ultimate Rares have been known to be printed as independent rarities, while they are used exclusively as an additional Booster Pack rarity in the TCG
Your local Pokmon League may permit the use of proxies during open play for testing purposes, but in all other instances, proxies should be treated exactly the same as other fake cards
While you cant memorise every card, learning the phases of MTG is one of the best ways to improve your skill as a player, helping you to properly plan your turns and know the exact time to drop an instant spell on your opponent to give you the biggest advantage
These are normally priced at 13.99, but have been reduced by a modest 19% as part of the Spring Sale
TCGPlayer: The king of volume
I guess when you say the card is limited in use, it was more planned to be like that than just a coincidence