Hearthpwn

The ultimate midrange deck.

Low to the ground for good tempo plays.

Kabal Talonpriest is a card I miss dearly, and it's so dank.

Minimal spells to make your shadow visions more consistent.

Entomb is the best removal spell in the game, so why not. Effectively counters Rez Priest.

Twilight Acolyte + Cabal Shadow Priest is a dirty move, and offers big swing turns.

Operative is easily the best card in the deck, so basically always pick him off netherspite historians.

Good game against even shaman thanks to the one sided boardwipe that is dragonfire potion, as well as the cheap sweeper, Duskbreaker.

Wyrmrest Agent is decent against quelling early aggression from decks like odd rogue. But its not mandatory.

I like the one of Twilight Welp. Its just a cheap dragon to activate your more expensive dragons and can be an early body if need be. 

I like the 2/1 split between entomb and SW: Death, but one can easily change that as well. 

Brann is a nice card to fit in if you can find room for it. Brann + Netherspite Historian + Draknoid Operative is conveniently 10 mana.

You can play Blackwing Corruptor and Blackwing Technician if you want to, but I find them to be too slow with the power level of current Hearthstone. 

I personally think that Dragon Fire potion is better suited for this deck than Lightbomb, but to each their own.

You can beat aggressive decks, other midrange decks, and outvalue while still applying pressure versus control decks. 

Bad match ups include Kingsbane Rogue, Combo Druid, & Combo Shaman.