Hearthpwn

Yes... another cubelock deck.  Well, this one is different. In fact it is not even trying to be Cubelock.  Instead were doing something else.  Milling our opponent out.

We start with the Cubelock shell, because Voidlord recursion is just too good at stalling the game to try and force some other form of end game push.  But rather than trying to set up wombos with awkward tempo turns, we are playing full on control.  Literally the only reason the Cubelock portion of this deck is here is to keep us alive, and give us breathing room

Why not Rin?

Because Rin forces us to split our attention between setting up other plays and advancing her gameplan.  Rarely do we have the excess of turns we need to reach Rin's climax.  In Mill Lock, we just play control and let our opponent exhaust themselves until we can start going to work on their deck in earnest.  Even better, the same tools we use to mill our opponent out, can also be used to extend our survivability and control of the game.

But How?

Thanks to warlock's hero power, it is pretty simple to reach the end of our deck first.  Before we reach fatigue, we use Baleful Banker to restock our deck.  Just by himself, Baleful Banker into Baleful Banker gives us infinite turns.  Other options, as well as playing out our deck well, give us the ability to to MORE with those turns.

Copying Gnomeferatu allows us to focus on milling our opponent if we are comfortable with our position in the game.  If not, we can focus on other things.  What really gives us the edge we need to push over the top, is being able to re-use both Baleful Banker AND Gnomeferatu with Zola the Gorgon and Glinda Crowskin.

The Unholy Trinity:

Glinda Crowskin, Baleful Banker, and Zola the Gorgon, give us our late game as long as we use them to protect each other.  Everything else is about controlling the game and staying alive.

Pretty simple and devastatingly effective.