Hearthpwn

Welcome to my TL;DR sized deck guide! Hope you enjoy!

Deck Breakdown:

This deck takes classic Handlock staples such as Mountain Giant and Twilight Drake and pairs them with a timely win condition in Arch-Villain Rafaam.

The deck also features a strong spell presence, which is bolstered by the inclusion of 1 copy of Mana Reservoir, which possesses one hell of a unique stat-line at 0/6 for 2 mana, and +1 Spell Damage, of course.

Faceless friends total 0 in the updated version of the decklist, but could total upwards of 4, should you desire. Lastly, the deck has access to a new shuffle mechanic introduced to Warlock with the most recent expansion.

Use Plot Twist in conjunction with Aranasi Broodmother and Sense Demons. Aranasi Broodmother heals the hero for 4 upon being drawn, turning Sense Demons into a 3 mana, draw two specific minions, and heal 8. Not to mention the combo's hand size advantageous outcome.

Finally, the new legendary that everyone gets for free for logging into Hearthstone, helps extract more value from the numerous spell options you have at your disposal, while also providing a 2/6 stat-line and soft-taunt status. 

Card Replacement Options:

For starters, all of the legendaries are core to this deck archetype and its objectives. Further legendary considerations include Leeroy Jackson (in conjunction with Faceless Manipulator), Bloodmage Thalnos, or Zilliax.

Going down the list provided in the deck breakdown section, each paragraph served as a separate package of certain cards - spells and minions, all bound together by a specific theme, with a singular intent and objective in mind. Tie all the packages together over the course of a match with the inherent synergies that exist between them and you will find success. As such, the aforementioned, themed card packages are also core to the deck. 

Meta-dependent Card Adjustments:

EDIT 1 (4/10/2019): -1 Faceless Manipulator, -1 Mana Reservoir, +2 Acidic Swamp Ooze - deals with prevalent weapons such as Spectral Cutlass and Wrenchcalibur better.

EDIT 2 (4/15/2019): -2 Faceless Rager, +2 Spellward Jeweler - ensures better longevity versus spell and hero power combos when at low health.

+1 Ancient Watcher, Sunfury Protector, Defender of Argus, and Shadowflame - ensures better overall longevity through the increase of taunt-enablers and a 2 mana 4/5 body that can receive taunt or be utilized with the additional Shadowflame copy also added.

-2 Arcane Watcher and Hecklebot - Arcane Watcher underperformed in the prior edition of the deck due to the lack of taunt-enable and consistent spell damage. Hecklebot was also counter-intuitive to the goals of the deck, although providing a 4 mana, 8 health target for Faceless Rager, was not worth the downside.

If people want, I can provide gameplay videos or further strategy discussion, such as specific matchup guidance, mulligan information, etc. I have provided some of this for the Bomb Warrior matchup in the comment section already. Please give me your thoughts in the comment section below and good luck laddering!