The value of X is calculated only once, as Edgar's last ability resolves
127 Card Types : 8 Leader Cards, plus Commons, Uncommons, Rares, Super Rares, and Secret Rares with alternate-art parallels
However, effects based on any additional costs that were paid for the original spell (such as teamwork) are copied as though those same costs were paid for the copy too
We picked randomly from our Advanced level WPN stores and sent the Premium Helvaults to their new home.' These Premium Helvaults, of which only 30 were made, contained 54 Foil Oversized cards of Avacyn, Angel of Hope, Griselbrand, Sigarda, Host of Herons, Bruna, Light of Alabaster, and Gisela, Blade of Goldnight
Of these, take a human creature and place them on the battlefield, attacking and indestructible until the end of turn
Examples are Battle of Wits (which requires a huge library to win the game) and Scapeshift (which requires playing enough Mountains to one-shot your opponent with Valakut triggers)