How can I obtain golden naxxramus cards?

I was watching Hosty play recently and noticed that all of his cards are gold - I was not aware I could obtain golden Naxx cards. What do I have to do to get golden naxx cards?

Are they simply craftable or do I also have to beat the Heroic bosses?


Solution 1:

Gold Naxxaramas cards are all crafted.

They are not obtained by beating the bosses on heroic. You can craft them after you get the normal versions of the card by beating Naxxaramas.

Source

Golden versions of cards are not obtainable through play, but become craftable using Arcane Dust once the player has obtained the regular version of that card. Golden Curse of Naxxramas cards cost the usual amount to craft for their rarity.