From what I could find, the Grand Prix cards are about 26x36 foam boards and are available in different languages
When an Enchant World comes into play, all other Enchant World cards in play are destroyed
3 is a way to increase damage, since in addition to evasion, the static ability can accumulate a lot of damage on the opponent even if the creatures on the battlefield aren't attacking
Modern Horizons 3 opened up a lot of options, and added all sorts of good and powerful cards to reward you for playing these crazy titans
Another typal highlight is Bloodline Bidding, an eight-cost black sorcery with convoke (creatures can tap to help you pay the cost), it returns all creature cards of the chosen type in your graveyard to the battlefield
Furthermore, each deck contains two foil commanders