I have yet to see someone open their fifth copy of a rare or mythic, though, so I dont know how much Vault progress those will give you
Most Pokmon cards are graded in accordance with Professional Sports Authenticator (PSA), which is scaled from a 1 for poor and a 10 for Gem Mint
It's an open-ended question, but if you can't answer it everything else in the deck won't matter
It won't trigger if you don't declare any creatures as attackers
One important note before we move on, though: the amount of ramp in your deck and the amount of treasure generation can free you up for playing more enters-tapped lands, as this allows you to be more mana efficient
The created card doesn't necessarily need to be from your deck, library, or sideboard, and could be a card in another set or format, as if it was created "out of thin air"