Hearthpwn

This might be the deck to make Warlock great again. After buffs to Dar'Khan Drathir and Infantry Reanimator it got really strong. It also benefits greatly from Rogue weakening, although Shadow Priest may be a bit too fast for it.

Early game this is just Handlock - turn 3/4 you can put out big minions with Goldshire Gnoll, Anetheron, Dark Alley Pact. Even if you have to use Drain Soul or Touch of the Nathrezim to fight early aggression, single The Sunwell makes Gnoll and Anatheron cost 1 again.

Than you turn to Reanimator - turn 5 Amorphous Slime is very often just game over, especially if it eats Flesh Behemoth. Your opponent will often be unable to kill them both so early or will try to not kill Slime at all. Than you just cast Shallow Grave on any of them and watch taunt undead deathrattle army grow. When they kill your first undead, feel free to throw in Infantry Reanimator.

This deck is not fast, so it has some controlling tools - Entitled Customer, Gigafin, Dreadlich Tamsin to clear opponents board (and sometimes also activate your deathrattles). Spice Bread Baker is a great lifegain in handlock. Theotar, the Mad Duke is the only defense against some combo decks like Sylvana Priest or Minelock. Sir Finley, Sea Guide helps bring your undeads back to library if you have no Flesh Behemoths targets. Although Flesh Behemoth and Dar'Khan Drathir are best targets for Amorphous Slime and Infantry Reanimator, we need another undead target for Behemoth and for that I chose Shatterskin Gargoyle - solid taunt with removal/damage deathrattle.

And finally we have Brann Bronzebeard. This is our turbo mode. Brann into Reanimator. Brann into Slime. And my favourite: Brann into Slime into Shallow Grave. These plays are just nuts and will win you game instantly very often.