Your good old Keleseth Zoolock but now with Marin the Fox.



Deck guide:

This deck is easy to play and you don't require to play Prince Keleseth to win (but it hleps).

Mulligan Guide (one for agaisnt all):

You want to keep EITHER Flame Imp or Voidwalker, never both, so you can have more odds of drawing Prince Keleseth.





If you already have Prince Keleseth on hand, you want to keep both Flame Imp and Voidwalker, this way, your other cards get buffed.

Drawing Patches the Pirate on the mulligan is not the end of the day. You can still use it with Acherus Veteran and/or Abusive Sergeant.

Deck Strategy:

Play Prince Keleseth before anything when possible! It will help you get huge Tempo.





Hold your Drakkari Enchanter to either play it on turn 4 leading into a turn 5 with Cobalt Scalebane or Despicable Dreadlord, or to a turn 8 with her and one of the two 5-Cost.





Be VERY careful with Doomguard, unless you are on a tought spot, don't play him if you have any cards that can be valuable.





If you only have one big body on board, you can use Deathspeaker to "trade" and maintain the board.





Even tho many think that Marin the Fox is a more "meme" card, it has great valu. Since most of the cards are low cost on this deck, all Treasures are valuable.





Remeber that you don't always need to play Bloodreaver Gul'dan as soon as you can, you can increase your Demon pool a bit more.





If you get to a point where you completly lost control of the board, don't be afraid to use DOOM!, burning one or two (sometimes even three) cards is okay, if it will secure the win (just don't do it if there is a chance that you will burn one of the high-value cards, like any of the Legendaries).





Don't be greedy to get most value of Deathspeaker, if using it on a smaller body will help you keep the board and/or allow to a bigger body to hit face, do it.





Don't go all-in if you already have the board. Keep 1 or 2 slots in the event that you need to play a buff or Taunt, board clear is a thing, and it will hurt your tempo if you go all-in without need.





Don't tap if you don't need! I usally rule myself to not do extra taps if I am 20 HP or bellow. If you already have what to play on this turn and next, don't go tapping, those Health Points will make a difference on the end-game agaisnt high-tempo decks.





Finally, losing is not the end. This deck can go well agaisnt the majority of the meta decks, losing is part of the game, high-rolls are part of Hearthstone, just because your opponent had more luck. Learn to take a break and keep focous, a single missplay can lead you to losing the game.

EDIT:

If you don't want the Pirate trupe, remove both Bloodsail Corsair and Patches the Pirate, add one Kabal Trafficker , one Soulfire for removal and either Sanguine Reveler or Forbidden Ritual (or any other combination of one or more of each).