Backstab - Staple in almost all Rogue decks. Helps with early game and favourable trades later on in the game.
Shadowstep - Helps complete the quest. Can also be used later in the game with the amount of Battlecry minions this deck.
Swashburglar - Works well with Patches the Pirate. Good Battlecry for bouncing. You might want to bounce this card against certain classes, such as Mage, Warrior, Rogue. The reason why is because there are plenty of cards you can get from them that can help.
The Caverns Below - Rogue Quest. The deck is built around this card. This is your win condition.
Eviscerate - Good early game removal. Staple in almost all rogue decks.
Gadgetzan Ferryman - Helps complete the quest. Can also be used later in the game with the amount of Battlecry minions this deck.
Novice Engineer - Card draw! Good Battlecry for bouncing. You probably want to bounce this card against slower decks to cycle as much as possible.
Youthful Brewmaster - Helps complete the quest. Can also be used later in the game with the amount of Battlecry minions this deck.
Mimic Pod - Gives you duplicates. At first I wasn't a fan of this card because of how slow it was. But after playing with/without it I have come to believe that this is a staple for this deck. If you land something crazy like a Shadowstep with this card then the game is already over. And of course... card draw!
Vanish - "Why are you playing Vanish without Coldlight Oracle?" In the previous version of this deck, I did in fact have Coldlight Oracle. However I noticed that if I drew Novice Engineer or Mimic Pod early, then the Coldlight Oracle would just be sitting in my hand. I don't like cards that just sit in my hand. Also, fuck Fan of Knives for AoE. Doesn't kill shit and it's probably going to draw you a Backstab anyway.