Hearthpwn

I was tired of the curse warlock not having that *oomph* against certain classes so you can win here on fatigue in the worst case scenario against eg. Control Priest. This is my first constructed deck and want to give a rundown of why each card is there so I can help other players build their own decks and get a sense of why is everything here.

Win condition(s):

Sira'kess Cultist and Za'qul are your bread and butter, Dragged Below and Abyssal Wave too of course but I mostly use them for control. Try and play Za'qul last because those heals can be massive when stacked up, usually, the spells take care of it so you have at least 3-5 healing even without Brann Bronzebeard.  Of course try to play them with Brann to fill the opponent's hand and make them burn some cards, especially in this meta with game winning cards. That's where the Selfish Shellfish comes in, my boy is very a very good drop on 4 mana and there are not a lot of removals for him and most opponents will try to get that draw and he basically becomes a taunt. But then you use Tamsin's Phylactery on a board full of Seeds of Destruction or even School Teacher with his Nagaling and an Imp spell(there are several ones you can discover) the opponent will burn cards fast, even easier because his hand will be filled with curses.

Dreadlich Tamsin can fill up your board with Seeds of Destruction and complete at least one cycle of Runed Mithril Rod

Tamsin Roame is definitely a must have in this deck because she can clone the curse spells and Curse of Agony(or even Drain Soul for that survivability and removal).

Gigafin and Siphon Soul are there just to remove some big bois that the normal curse spells can't. (You can just put in two Siphon Soul in the deck if you don't have the legendary but he can clear up buffed up Paladin cards like no other).

Queen Azshara is mostly a win more card but can help out for the draw discover or even the Colossal can help control the board a bit more(of course the spell copy can be coupled really nice with a lot of cards in the deck).

Mulligan:

Depending on the match up if it's a high aggro deck I try to keep  Drain Soul in my hand because most of the current meta aggro cards don't have more than 3 health and that heal is really nice. If it's a slower deck keep Seeds of Destruction to prepare for Runed Mithril Rod. 

PS: If you go against a quest hunter don't play any minions or curses just build up your deck and try to play the long game.

Don't expect too many wins from the deck but it's really fun to pilot through the ladder because it can be played in different ways. All tips or critisism would be greatly appreciated. GL :D