This is a peasant cube of my creation. I really want it to be a high power level environment, by peasant standards. I've considered rare lands to facilitate this, but for the time being, I'm keeping everything peasant-legal.

Archetypes

Mono Black Devotion
Gray Merchant of Asphodel creates an entire archetype unto itself.

Mono Red Burn
Throw a bunch of burn spells at your opponent's face. No one wants to draft this in cube, which means Lightning Bolting your opponent to death is always on the table.

Mono White Blink
This deck is your pretty standard fare for these sorts of cubes. Bounce something back with Kor Skyfisher, or blink it directly with Felidar Guardian.

/ Azorius Artifacts /
This deck has some synergy with the blink deck, but largely is built around having and creating multiple artifacts with Master's Guide-Mural as the primary payoff.

/ Dimir Drawing Extra Cards /
This deck is based roughly on the "draw your second card this turn" mechanic seen in Brothers' War/Throne of Eldraine. Baleful Strix and Vohar, Vodalian Desecrator help turn it on.

// Reanimator //
This deck is made to synergize with the "Drawing Extra Cards" archetype, as several of the draw effects are looters like the aforementioned Vohar. Other colors give you extra graveyard synergies.

/ Rakdos Sacrifice /
This deck has a lot of support, creatures will die in this cube and you are built to make the most of it. Mayhem Devil and Juri, Master of the Revue even give you payoffs for sacrificing noncreature permanents.

/ Gruul Monsters /
This deck is a go-big beatdown deck. There's a slight non-human tribal payoff with Grumgully, the Generous.

/ Selesnya Modified /
This deck rewards you for putting things on your creatures, be they counters, equipments, or enchantments. Golden-Tail Trainer and Kutzil, Malamet Exemplar point you in the right direction.

/ Orzhov Sacrifice /
This deck has a lot of overlap with the other sacrifice deck, but benefits a lot from the token generators found in white. Throw them away to Hidden Stockpile and slowly burn your opponent out with Elas il-Kor, Sadistic Pilgrim.

/ Orzhov Control /
Sometimes the Rakdos deck gets all the good sacrifice cards in black and you're left trying to piece something else together. Fortunately, you have access to all of the best removal, in addition to the only uncommon-rarity hard sweepers.

/ Izzet Spellslinger /
This is the historically well-supported deck we all know and love. Make a bunch of tokens with Third Path Iconoclast and overrun with Balmor, Battlemage Captain.

/ Izzet Spellslinger 2 /
There's really two forms the Izzet deck can take and I thought I should highlight the other one, which could also play more like a control deck with things like Rolling Thunder and finishes with a big spell instead of the Prowess-style finishes.

/ Golgari Delve /
This deck not only wants cards to enter your graveyard, it also wants them to leave it. Insidious Roots gives you plant tokens when you delve or bring something back with a reanimation spell or Regrowth.

/ Boros Tokens /
Go wide with tokens, beat face like Boros is known to do. Heroic Reinforcements for lethal, math is for blockers.

/ Simic Mana-Value Matters /
Ramp, cast big spells, get rewarded for doing so. It's the Simic way. Imoti, Celebrant of Bounty should allow you to cast a lot of your deck pretty easily. Going into black gives you access to the large delve spells, and you could go for an artifact build as well, to capitalize on Affinity and cast expensive spells for cheap.