Achievement grinding can be hard and monotonous. But you can grind towards more than one achievement in one sitting. That's how this deck came to life. Now, the achievements:

Tamsin Roame + Curse of Weakness can create an endless loop of 0 mana Shadow spells for the Shadow of a Shadow achievement. In fact, this combo is the idea behind the deck in the first place. Don't forget to copy Tamsin Roame with Zola the Gorgon in case the opponent can clear the first one.

Hog Rancher for Hog Wild achievement. Can be replaced with Venomous Scorpid for the Sting Operation achievement instead.

Imp Swarm (Rank 1) for the Signature Moves achievement. The imp tokens help you grind out the What's Better than Two Imps? achievement.

Burning Blade Acolyte summons the Demonspawn for the Spawn Shop achievement. But here's the good news: Bloodreaver Gul'dan can summon more Demonspawns and yes, those count too. And don't forget N'Zoth, the Corruptor, he brings more Burning Blade Acolytes.

Lastly, the demon package is there because I had already finished the Maximum Security achievement so feel free to swap them for the watch posts, but accept the fact that both Bloodreaver Gul'dan and N'Zoth, the Corruptor become less impactful. Oh, and if you do, the 4 mana slot becomes clear, so you can bring out Kazakus, Golem Shaper if you want to go for the Build-a-Rock Workshop achievement.