Shoebox

Huge shakeup for g.
First and foremost, Triomes had to be added for better color support. Addressing the cards removed for the Triomes first, one by one: Creeping Tar Pit is obvious, it was the last man land, and though it still fulfilled its original role, the spot is ultimately more urgently needed as fixing.
City of Brass is almost never drafted, even in 5 color. I don't believe this is the cube for these lands.
Knight of Autumn is a victim of circumstance. A perfectly serviceable card and arguably the wrong cut, just needed space.
Hidden Stockpile is an underpreformer, sad.
Caller of the Claw no longer fits with g's theme, more on that when we get to g's section.
Steelshaper's Gift is almost 100% of the time played to grab Colossus Hammer. The point of Hammertime is to be playable in an deck as a small side package, if a w card is being used only for it there must be better options.
Grand Crescendo hurts to see go. It's a very strong card when you have infinite mana, token synergies, or with spell doublers. This is a choice that I may regret in the future, It will go to the maybeboard for now.
Mogg Maniac is serviceable but cuts need to be made.
Same with Archaeomender and Graveshifter.

There are a few additions I made that don't involve g's overhaul, let's get those out of the way first.
Conflagrate is needed to replace x mana finishers in spell doubler decks. Super-Duper Death Ray had a good run.
Wizard's Rockets is an incredible card when you either have infinite colorless mana and need infinite colored mana or have infinite mana of one color and need more than one color. Plus it draws and is searchable, insane. Servo Schematic is a very solid card, but is not a unique effect, fellas like Myr Sire do similar things.

Now for the meat & potatoes. g has felt underwhelming for a long while. It is hard to balance a color like g in an environment like mine. I do not want big creatures, but I want big mana. I do not want big board wipes, but I want wide boards. I do not want tribes, but I want dorks. After a long and tedious process, ultimately the best solution seemed to be expand on the archetypes already available in the cube and don't give g a super unique identity. Sad, but there are plenty of unique and flavorful interactions that play out in the new g. I decided to expand on discard, graveyard, storm, lands, and the g enchantments. No additions here should be surprising and no expulsions should be surprising, either, given the parameters. A lot of thought went into an ultimately simple change, but I believe sometimes the simple changes are the best.