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reponse sur mtg en effet

If the Spirit or Arcane spell has X in its cost, that X counts toward the converted mana cost of the spell. For example, the Betrayers of Kamigawa card Shining Shoal costs X . If you choose X = 2, then Shining Shoal's converted mana cost is 4. Shining Shoal also has an ability that says "You may remove a white card with converted mana cost X in your hand from the game rather than pay Shining Shoal's mana cost"; if you choose to pay the alternative cost and remove a card with converted mana cost 2, then X is 2 while Shining Shoal is on the stack and its converted mana cost is 4.

Aller, en route pour la lecture d'une edition qui m'a l'air bien meilleure que d'hab en terme de nombre de bonne petites cartes jouables...

youpi j'avais raison
l'edition a l'air surotut plus amusante que que betrayers
On vera bien, vivement les preview