About one more matter…
[Progression] Fixed a bug where unlocking the Death Knight class automatically granted all Death Knight’s Golden Core set.
So, now you acknowledge that this was actually a bug and not a special ‘promotion’ (undocumented, perhaps, but still… Besides, what is actually documented properly in this game nowadays?), with the new class having been introduced?
I’ve been drawing parallels with some core Demon Hunter cards — apparently, their golden version have been granted immediately, even if Golden Core cards of any quality are not available for that class, which is the case for my collection. For example:
https://hearthstone.fandom.com/wiki/Chaos_Strike
https://hearthstone.fandom.com/wiki/Chaos_Nova
and a few others — I believe I have their Golden Core versions.
One more thing. As usually: if there’s something that grants something extra to players, no matter how small — shut it down immediately!!!11 However, if players have invested into something which hasn’t been working for a long time (notably, nonfunctional Mythic upgrades for a number of mercs and other bugged ones like Ysera, among others) — that can apparently wait indefinitely, eh?
PS Alright, checked it out in detail: apparently, the Golden Core cards for the Demon Hunter class that even I have correspond to golden Legacy cards, or, in particular, former Basic cards:
https://hearthstone.fandom.com/wiki/Basic#Demon_Hunter
https://hearthstone.fandom.com/wiki/Legacy#Demon_Hunter
. I can’t immediately find the source, but I think owning a golden card is supposed to grant its corresponding golden Core version, too, so that’s might be what’s going on there (can anybody confirm it?), and that the DK Prologue used to award golden Core DK cards was indeed a bug (I remember how it surprised me back in the day).