And his devastating -12 for ultimate card advantage
Think of things like every fetch land, Primeval Titan, their own Field of Ruin, Scapeshift, Whir of Invention
It's pretty much a slightly worse Vampiric Rites, which is one of my go-to budget sac outlets: same cmc, same mana cost activation, same payoff, but Cauldron taps to activate so can't sacrifice multiple creatures per turn unless you have other ways to untap it

Carnage Altar Ceremonial Knife Chandra's Regulator Chromatic Orrery Chromatic Sphere Chromatic Star Chronicle of Victory Chronomancer Circuit Mender Clamorous Ironclad Clockwork Fox Clockwork Servant Coercive Portal Collector's Vault Colossus of the Blood Age Combat Courier Combat Thresher Combustible Gearhulk Commander's Sphere Conch Horn Conjurer's Bauble Contested Game Ball Cosmos Elixir Courier's Briefcase Courier's Capsule Coveted Falcon Coveted Jewel Cranial Archive Credit Voucher Cryogen Relic Cryptex Culling Dais Cult of Skaro Curie, Emergent Intelligence Currency Converter Cyclonus, Cybertronian Fighter Cyclonus, the Saboteur Daily Bugle Newspaper Damocles Base, Sword of Kang Daredevil Dragster Darkwater Egg Data Scrubber Davros, Dalek Creator Deal Broker Detective's Satchel Detention Chariot Diary of Dreams Dictation Quillograph Dimir Cluestone Dimir Locket Diviner's Lockbox Diviner's Wand Dragon's Hoard Dreamstone Hedron Dross Skullbomb Dungeoneer's Pack Dyadrine, Synthesis Amalgam ED-E, Lonesome Eyebot Eerie Gravestone Elsewhere Flask Emmessi Tome Endless Atlas Energy Refractor Esoteric Duplicator Esper Sentinel Esper Sojourners Etherium Astrolabe Everythingamajig Everythingamajig Eye of Vecna Faerie Aerie Farsight Mask

Full-Art Storybook Basic Lands We've brought the storybook flair of Eldraine to its basic lands
The problem was that if the tokens themselves were the bulk of what you got, why would anyone ever pay the echo cost