Welcome to Simm's Eldraine Cube! This cube is a combination of cards from Wilds of Eldraine, and Throne of Eldraine, combining the interesting aesthetics and themes of the two sets.

Azorius - Hilda's Winter: Combine the normal control effects of Azorius with tap-down synergies and payoffs to gain value and tempo, then struggle to remember the modes on Cryptic Command.
Orzhov - Eriette's Charm: Create tokens, enchantments, and token enchantments, generating value when they enter or leave, then get poisoned by Eriette's Apple.
Boros - Ash's Army: Use either Knights or celebration or both to create an overwhelming early board, and smash, then cast Embercleave for 2 into a boardwipe.
Selesnya - Ellivere's Wilds: Enchant your creatures, then buff your enchanted creatures, and spend too much time counting whether the creature is an 8/8 or a 9/9 after all the buffs.
Dimir - Talion's Fae Court: Combine Faeries, control elements, Faeries, and some Faeries to generate a solid board, then send Rankle, Mankle of Prankle to your opponent's face.
Izzet - Johann's Spells: Cast spells that remove creatures, and generate value for doing so: remember that Adventures are often BOTH non-creature spells, AND creature spells, for extra spells per spell.
Simic - Troyan's Mana-rich Beans: Ramp, a lot, and then play all of the spicy and expensive cards, then ask yourself if Up The Beanstalk should be banned in Cube like it was in Modern.
Rakdos - Totentanz's Rat Swarm: Rats. Rats. We are the Rats. We prey at night, we stalk at night, we are the rats.
Golgari - Greta's War on Sweettooth: Generate Food tokens, making use of Bargain synergies and lifegain to outlast your opponents, then forget to take the cat out of the Witch's Oven...
Gruul - Ruby's Big Creatures: Ramp, then play creatures, maybe with some +1/+1 counter synergies along the way.

Importantly, it is very possible to create a deck with more than two colours. Typically, you will need to be based in green for the better fixing and mana acceleration. Doing so allows for 3-, 4-, or even the rare 5- colour Adventures deck to pay off, but doing so is risky.