A card counts as the same as another card if it has the same nameit does not matter whether the cards have different art or come from different sets. Pokmon Call of Legends Rulebook There are 5 kinds of cards: Pokmon (basic and their evolutions), Energy cards (basic and special), Trainers, Supporters, and Stadiums (frequently abbreviated T/S/S)
After all, we are much more likely to protect someone that gives us stuff rather than those who take the stuff away
Even if Chaos Orb werent banned attempting this in a tournament would result in immediate disqualification
Part of the fun with Urza is that you don't automatically just win with his ability
About five years ago, those types of cards were much better since cubes were slower, but with many cubes adopting aggressive strategies and getting more efficient removal options, things like the Vindicate test (where you get an effect out of it if the creature dies at sorcery speed, so Consecrated Sphinx passes that test) hamper its effectiveness, but it does protect itself well if you are able to untap with it since you can turn just about any blue card into a counterspell or draw card
