I discovered that some time ago Heathstone had two adventures that are "gone" from the game, Goblin Vs. Gnomes and Curse Of Naxxramas. Blizzard removed those adventures, and, from what I read and what I think I understood, those adventures are now the Whispers of the Old Gods expansion.
I have some questions about this.
Could people who bought those adventures have cards that do not exist in the Whispers of the Old Gods expansion? (which could create an advantage for those users.)
The Whispers of the Old Gods is free, right?. I mean that when we refer to the term "expansion" we are just refering to the collectible card-packs of Whispers of the Old Gods, or is there something else comprising this expansion?