They usually contain a few 60-card decks, as well as a game board, and several guides and tutorials, for both new and advanced players, who can try and refine their strategies
You cannot choose to have it enter the battlefield as a creature
The biggest differentiator among sites is how they communicate conditions and manage risk
Not only does its damage scale into the late game, making it an insane top deck, it also has a large body with relevant abilities when you play it on curve
No, it cannot find a Mystic Sanctuary if your legendary creature is blue
Meeting specific defeat conditions (such as Typhon's heart destroyed, Belial abilities being cancelled when opponent reached 0 life point, allowing resolve God's Art from Extension Rule Seven Kings Land: A chapter of Betrayal, etc,.) New Frontiers format: an old format, currently being replaced by Wanderer