Do not DE your Flamewreathed Faceless Cards from Pack Openings. If your smart you will keep them because Blizz at some point will Nerf it. A 4 Mana 7/7 is ridiculous whether you get overload or not since there are cards to open your locked crystals.
Not sure which dev made this card and ok'd it but its ridiculous.
But yea I opened up a gold one and have a couple normals and not DE them because it will be free dust.