Scrying, tutoring drawing, exile effects, recurring and milling are all common ways that work for card draw and are commonly used
Guilds of Ravnica has the best split card cycle of all time

Advanced Search Sets Random Syntax Abandon the Post Ancient Grudge Angelfire Ignition Antiquities on the Loose Arcane Infusion Archmage's Newt Army of the Damned Auron's Inspiration Bulk Up Bump in the Night Cackling Counterpart Call the Mountain Chocobo Can't Stay Away Chainer's Edict Chatter of the Squirrel Corpse Cobble Crawl from the Cellar Croaking Counterpart Daydream Deep Analysis Devil's Play Dig Site Inventory Dire-Strain Rampage Diregraf Rebirth Divine Reckoning Dreams of Laguna Dryad's Revival Duel Tactics Electric Revelation Electroduplicate Esper Origins Eviscerator's Insight Faithful Mending Faithless Looting Feeling of Dread Fire Nation Attacks Flashback Forbidden Alchemy From Father to Son Galvanic Iteration Ghoulcaller's Harvest Gnaw to the Bone Group Project Gysahl Greens Hallowed Respite Homestead Courage Hungry for More Increasing Ambition Increasing Vengeance Inspiration from Beyond Iroh, Grand Lotus Join the Dance Kindle the Inner Flame Laughing Mad Lier, Disciple of the Drowned Light Up the Night Lingering Souls Lost in Memories Memories Returning Memory Deluge Moan of the Unhallowed Molten Note Momentary Blink Multiversal Recruitment Mystic Retrieval Mystical Teachings Nibelheim Aflame Otherworldly Gaze Otterball Antics Past in Flames Path to the Festival Phantom Carriage

Drop it early, smack it while defenses are low, and you could end up with a potential creature in the first few turns
Elderly Commander players like myself will recall the distant year of 2021, when Boros was widely considered the weakest guild in Commander and white was pooh-poohed as too weak and too difficult to play without access to stax