A year ago, Blizzard added diamond cards to Hearthstone. A tier above golden rarity, diamond cards are animated, though otherwise the same as the regular version of the same cards. They're cosmetics, and when they were first introduced you could get them either by buying an expansion or collecting all of a set's legendary cards. The latest diamond card, which is of orc shaman Drek'Thar, can only be obtained by purchasing it from the in-game store where it costs 3,000 gold or $25.