Forum:Orichalcos vs field spell card

Hi guys i have a Question, if i already have activated the seal of orichalcos and my oponent activate other field, for example Umi, and the seal of orichalcos effect say that once per turn cannot be destroyed, what happen in this case, is destroyed my Field and resolve Umi or not? please i will wait for the correct answer.Placido 03:18, November 18, 2012 (UTC)