Hearthpwn

I didn't do the math on Book of Specters and Mountain Giant yet but I'm going to assume it works.

The main idea is to draw a ton of cards from your deck with Book of Specters and Arcane Intellect to guarantee Frost Lich Jaina by turn 9 and enable Mountain Giant on 4.

The deck plays anti aggro with Doomsayer,  Tar Creeper, Witchwood Grizzly and Mossy Horror. Then uses Frost Lich Jaina to finish off the aggressor. 

Since I put in so much anti aggro, to counter control you can Giant on 4 (probably) or go long with Sindragosa and the Death Knight. Toki, Time-Tinker is a meme card replace it as you see fit. 

Combining Archmage Arugal and Book of Specters ensures you never run out of value, assuming value is important in the Witchwood meta.