Death Knight cards removed?

[Skizzy-11719]

Yes, all of those reports seem to be unaware of the Known Issues post by Blizzard:

@GnomeSayin-11972

We are seeing many reports of Golden Death Knight cards being removed from decks. Don’t worry, this is NOT a bug, this is the fix to a bug that prematurely granted all players all Golden Death Knight Core cards before they were earned (see the 26.0 Patch Notes ). Simply swap out the Golden versions for normal versions in your decks and you will be able to play again.