Adding another land fixing card, also can be 2 mana draw

Colorless planeswalker that is pretty decent and gives a buff in artifacts

Creature/Artifact clone (will be considered colorless)

Colossus of Akros mid pet card replaced with Triplicate Titan artifact & reanimator

Replace Ob Nixilis of the Black Oath with Liliana of the Veil more versatile card and also helps out reanimator

Disentomb does not see much play and Chthonian Nightmare seems like a cool combo card

Stormplain Detainment is a duplicate of an existing card and Touch the Spirit Realm is similar with a cool blink mechanic

Remove the pet card Bearer of the Heavens and replace with a aggro/artifact card Combustible Gearhulk

Have never been a huge fan of Sphinx of the Final Word and also does not see much play, Kappa Cannoneer is cheaper (and has improvise), hard to kill & evasion

Gigantoplasm has been a temp card & Urza, Lord High Artificer is artifact and just really good

Rubblehulk looks pretty good but does not see any play, will have to see how Halana and Alena, Partners plays out

Blitz Hellion fun but not really good, Bloodbraid Challenger seems crazy