Hand of Vecna's triggered ability uses the number of cards in your hand as it resolves to determine the bonus the creature gets
So far at least, it seems like the Codex Bundle is the only way to get these special reprints
It was the card It didn't take long for Richard to explore the idea of a card representing an object that creatures can travel in and/or ride, as Arabian Nights
Sure, in the type of decks that want him, Urza probably will want to let that ultimate rip pretty often if you can, but he provides so much long term value that keeping him at high loyalty and just grinding out card advantage with him seems great in some games
Getting a card graded can help make the resale process smoother
Paralyzed, Asleep, and Confused conditions also dont stack since they change the position of a Pokmon card