The problem is that the Nightmare Lord Xavius signature card appears to be disenchantable, and I currently have three copies of it. One copy came from a shop purchase, which I understand is disenchantable, but the other two were obtained from Golden Packs. I’m confused as to why I’m still receiving additional copies from packs when I already own one, especially since they’re also disenchantable.
The fact that this card can’t be disenchanted is a current bug. They are working on a fix for this.