Hearthpwn

Here comes Hagatha summoning demos out of the swamp :-).

The deck is a control deck. It needs setup to start running.  The deck has a so much board control that warriors might get pale.

The deck has a strong draw engine and if that goes rampant feels like going to fagitue. But it usually wins before that point.

Card choices:

 0 Mana:

  Zap: Huge synergie and a fast shot.

1 Mana cards: You need a good number in this deck for the draw engine and they help in early game or when mana is locked.

Blazing Invocation: One of the greatest cards here. Choose wise :-).
Lightning Bolt: huge number of targets you need to shoot down fast
Voltaic Burst:  brings top flexibility and board spam.

2 Mana:
Witch's Brew: awesom healing that you need in this deck and can get you the lighning storms.

3 Mana:
Lightning Storm: so much wide board decks ...
Spirit of the Frog: Core of the deck leads to board flooding and drawing.

4 Mana:

Copertail Imposter: Your invisible shudder will be serious with 26 attack....

Hex: classic get rid of that giant or deathrattle

Portal Keeper: Core card for the engine

Omega defender: OK as T4 defence. It´s battlecry on shudder is a threat especially twice. At 10 mana a must remove threat.

Thunderhead: Great board control support and a threat.

Witchwood Piper: you want your spirits so thats your main consistency card. (and it´s a demon)

5 Mana:
Hagatha's Scheme:  not much to say. It is THE survival tool.

6 Mana:

Portal Overfiend:  More demons and a OK body. Two 4 mana portal demons are not enough to be consistent.

7 Mana:
Swampqueen Hagatha:  Value card to prepare a devasting move.

8 Mana:
Hagatha the Witch:  In the current meta this is two more boardclears (with Shudder) so huge value. 5 Armor and random spells help too.

9 Mana:
Shudderwock: more value ... Basically fills your deck with demons (+ blazing battelcrys and Hagatha´s)

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Good other cards i used  . So if you need substitutes those are great. 

Earth Shock: lot of targes to silence and 1 mana synergy. Proved to be good.

 Arcane dynamo: A body and the discover options are strong. there are only five spells to select: Bloodlust, Scheme, Eureka, Rain of toads and Storm bringer! All except eureka are game winners in this deck.

 Archivist Elysiana: You win the fagitue games .... After 30+ minutes. I decided to go the omega route to actually finish not prolong.