It is a good idea to keep Fracking and Cursed Catacombs to find your keep pieces, alongside with Holy Eggbearer to draw Khelos. All of this will help you to setup very strong and sometimes even game-winning turns 3 and 4.
The deck centers on The Egg of Khelos, a 3-mana 0/3 minion. After it is destroyed five times, it summons a massive 20/20 Taunt minion. Warlock excels here by using cards like Dark Pact, Grimoire of Sacrifice, or Conflagrate to intentionally kill the eggs. To accelerate the process, Umbra is used to copy the egg’s deathrattle or summon multiple copies of the egg itself. A successful game typically results in a board filled with multiple 20/20 minions as early as turn 5 or 6, overwhelming opponents who cannot clear such a massive total of stats. You are very flexible with cards like Cursed Catacombs and Eat! The! Imp!, giving card draw and needed cards in the right time. Smothering Starfish is extremely effective in the mirror match. Enjoy the deck and happy climbing!