I tried this deck and it wasn't that good lol. You take too much damage when you draw your cards.

I'll just leave this guide here as an archive of my theorycraft failure.

Okay, this is very likely the highest skill ceiling deck in hearthstone history thanks to these 2 cards: 

PLAYSTYLE

The way we play this deck is to draw our entire deck to look for combo parts, which can be any card in our deck but must include at least these 2:

Now why is this deck the most complicated deck in hearthstone you ask? Well not only that the combos are very complicated, but this deck also requires [Hearthstone Card (fast thinking) Not Found] due to numerous amount of efficient ways to draw cards. What I mean by this is since you spent so little mana to draw cards, you might draw cards that can entirely change your gameplan for that turn, or even just do an OTK.

And, since we're using Spectral Pillager any card can count towards our combo, may it be Counterfeit Coin or Pen Flinger. But the best cards for our Spectral Pillager are as follows:

• Foxy Fraud is the first reason why I made this deck to begin with. With Spirit of the Shark, this is pretty much a Preparation for your combo cards.
• Tenwu of the Red Smoke is the second reason. Being able to bounce Spectral Pillager and make it cost 1 mana is immensely efficient.
• And to top it all off, Shadowstep is used to repeat the cards above AND make them cost 0.

Oh, and did I mention Pen Flinger?

While you're drawing your cards with your spells, you can damage your opponents too. Pen Flinger is also a great way to increase Spectral Pillager damage. Pen Flinger might even be an alternative win condition by itself if your Spectral Pillager gets Dirty Rat'ed.

SURVIVABILITY

Wild is a very fast place. I expect a surge of odd paladin, so these cards help immensely with early game and survivability:

• Patches the Pirate helps with assuring the early board state.
• Prize Plunderer can be played after one other card to kill a Silver Hand Recruit. It's also a pirate so it can also pull out Patches.
• Cloak of Shadows is probably the best of the bunch. Pretty much skips your opponent's turn if they're playing an aggressive deck.
• And of course, Pen Flinger obliterates every single Silver Hand Recruits that have ever graced the earth.

COMBOS

• Spirit of the Shark + Foxy Fraud + Elven Minstrel [Total of 6 mana to draw 4 minions + Spirit of the Shark setup]
• Spirit of the Shark + Cloak of Shadows [Total of 7 mana to flip the bird to aggro decks + Spirit of the Shark setup]
• Spirit of the Shark setup --> Foxy Fraud + Shadowstep(Foxy Fraud) + Spectral Pillager + Tenwu(Spectral Pillager) + Shadowstep(Tenwu) + Foxy Fraud + Spectral Pillager +  Tenwu(Spectral Pillager) + Spectral Pillager [Total of 7 mana for 4+12+16 = 32 Damage]

I'm pretty sure there are probably a lot more combos in this deck, but I'll have to see first whether this deck is actually good or not.