The idea here is a set of 5 mono colored golos decks each themed around a particular land - I had to give up on mono red and just do Nykthos, which several of the other decks use, but it has its own unique feel with wonky high pip cards.
All of the decks are limited in some way, and they spend a lot of energy making sure they can cast golos on turn 4 or so and almost always 5. They use cascading cataracts to enable activating golos, but do not expend a lot of energy trying to generate golos mana in general.
I try to avoid a lot of typical tropes of the various mono colored builds and explore some different avenues of attack.
I have always really loved lands in EDH and getting to use lots of my favorites without being quite as oppressive as most lands strategies - particularly not being so reliant on crucible+multiple land drops+tons and tons of shuffling - has been really a treat.
* NOTE* These decks may be slightly out of date. It's quite a bit of work to keep them up to date. They are always correct on my deckbox.
Mono Green - Gaea's Cradle
This deck seeks to do some of the less obvious things mono green can do; instead of focusing on playing tons of extra lands, we're focused on untapping lands to do stuff, specifically generating a lot of activations of thawing glaciers or gaea's cradle. This deck has a lot of mean tricks, and can win off of generating infinite mana and infinite-bouncing things with temur sabertooth.
Like all of the decks there's a strong subtheme of land toolbox with untapping maze of ith and deserted temple putting in a lot of work. winding canyons serves as a way to enable instant speed golos activations on other turns - it's the only one of the five that really tries hard for multiple golos activations.
This build has a subtheme of podding/evolving golos for value.
Commander
Creatures (30)
Planeswalkers (4)
Enchantment (7)
Instants (5)
Sorceries (13)
Land (39)
Mono Red Devotion - Nykthos, Shrine to Nyx
This deck has a vibe like mono red devotion from its brief stay in modern. It's overwhelming when it works and has a few tough mono red combos like godo helm, kiki conscripts, and dualcaster/twinflame. It has a very strong subtheme of creating token copies of Golos with methods such as twinflame and flameshadow conjuring.
The land toolbox is focused on giving creatures haste and having a small endgame in valakut.
Mono White Enchants and blinking fatties - Serra's Sanctum
This was the first deck, a bit of a riff on mono white Heliod enchantments. It focuses on generating obscene value through blinking creatures with skybind including Golos. It can assemble the powerful infinite combo of opalescence and parallax wave and is the only deck with a second crystal quarry effect. The deck does not generate a ton of mana with serra's sanctum most games, but can usually generate enough to be comfortably activating Golos and casting some other spells.
There's a small reanimator subtheme, and the backup land toolbox uses hall of heliod's generosity and emeria, the sky ruin to present a powerful endgame. It also tries to generate enough colorless mana to enable eldrazi displacer.
The deck can achieve powerful soft locks with heliod, god of the sun and skybind that cascade into functionally infinite mana.
Mono Blue Artifacts - Academy Ruins
This deck has quickly become a fan favorite and one of my favorites to play. I've never really cared for an artifact theme deck before but this one has turned out really fun for some reason. I'm not sure what it is about it but it's really powerful, resilient, and does a lot of interesting things and somehow doesn't set off my derp alarm.
This deck gets to play my mishra's workshop which is awesome, but the main thing it looks to do is get academy ruins to protect its nonsense artifacts. It can use rings of brighthearth to generate truly comical value with the various artifact abilities.
Its land toolbox includes cards like inventors' fair and buried ruin.
This is probably the objectively most powerful Golos deck but it has a lot of intentional glaring weaknesses - skipping out on some of the really powerful artifact payoffs like staff of domination and cost reducers such as etherium sculptor. It tends to need to assemble multiple cards over multiple turns to win but it can occasionally go off. It's pretty light on interaction and vulnerable to artifact hate - probably the most vulnerable to stony silence effects.
Mono Black Goodstuff - Cabal Coffers
This Golos deck uses mana doublers and cabal coffers to generate overwhelming amounts of mana. It pointedly does not play X spell finishers because they felt too easy - torment of hailfire for example. It does a pretty fun job of reusing Golos through various reanimation methods. This deck is probably the least reliant on Golos activations to win because the bombs it slings are huge, and it has the best card advantage engines of the project (e.g. necropotence.
This deck is largely patterned around mono black goodstuff which has existed for most of EDH's history.
After playing it a lot, the mono black deck tended to be shut off hard by enchantments and artifacts, particularly graveyard hosers. So I gave it a secondary attack axis of eye of ugin and big eldrazi like emrakul, the promised end and ulamog, the ceaseless hunger. This tends to work really well since this deck generates by far the most mana of any of the project decks.
The land package includes allstars such as volrath's stronghold and phyrexian tower which together assemble an engine capable of recasting Golos every turn when needed.