This is my take on Mill Warlock.

Generally, the plan is to wait for a sweet opportunity to burn your opponents cards as they come out from Brann Bronzebeard and Coldlight Oracle. You can also use Brann Bronzebeard and Gnomeferatu to ensure that they're ahead of you on the race to run out of draws. You can use Baleful Banker to add to your deck to try and outlast them.

Comes with the standard Voidcaller and big demons package to help you survive early pressure. If you need a specific card, The Soularium into Plot Twist (the cards won't be discarded if they go back into your deck) can be super helpful.

Curse of Rafaam and Tanglefur Mystic are there to fill up the opponent's hand before using Coldlight Oracle to burn their deck. The Cursed! card is great for stealing tempo from aggressive decks.

I'm not sure that it's competitive, but it's pretty fun to play. Works best against slower decks.