Ogni avversario esilia carte dalla cima del proprio grimorio finché non ha esiliato carte con valore di mana totale pari o superiore a 5 in questo modo. Fino alla fine del turno, puoi lanciare le carte esiliate in questo modo senza pagare il loro costo di mana.
If a spell you cast has
in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.
Since you are using an alternative cost to cast the spells, you can't pay any other alternative costs. You can, however, pay additional costs, such as kicker costs. If the card has any mandatory additional costs, you must pay those.
If a card in a library has
in its mana cost, X is 0 for the purpose of determining its mana value.