Smokestack has rarely, if ever, seen play, so I replaced it with The Rack to strengthen the Machine Head archetype.

Fallen Askari has been underwhelming in performance, so I swapped it for Cabal Interrogator to further support the same archetype.

To make the Cube fully Premodern-legal, I decided to remove Entomb. In its place, Graveborn Muse adds value as an extra card-draw option, particularly for decks like The Rock.

Lastly, Sengir Autocrat has seen almost no play, so I replaced it with Vendetta, a highly efficient removal spell.