Not true . From the MTG salvation Wiki The only case in which a spell ' s converted mana cost can ever vary is for spells with in the mana cost . When an object with X in the mana cost is on the stack , X equals whatever value was chosen for it when it was put on the stack . In any other location , X equals 0 . Vial Smasher ' s triggered ability checks the CMC of the spell while it ' s on the stack , so it sees X as the value you paid for it . <| sep |> Sorry , you forgot to add s at the end . <| sep |> thanks ill check it . <| sep |> routside is leaking <| sep |> Yup . Look at Tim Wu ' s book The Master Switch The Rise and Fall of Information Empires . He describes how corporations have closed disruptive technologies in cycles . Interesting read .