For Prey Upon to be good, green needs to have bigger common creatures than every other color (particularly ones available on turns three and four) and for cheap, instant-speed interaction to be scarce
I cant wait to revisit this again when we have another dinosaur theme set to give us more big hits, maybe an unannounced set for the plane of Muraganda reinvigorates Magic with dinosaurs

Act of Heroism Aim High Assquatch Basil, Cabaretti Loudmouth Beacon Hawk Bounding Krasis Bringer of the Red Dawn Chain Stasis Chakram Retriever Civic Gardener Companion of the Trials Dauntless Aven Disciple of the Ring Djeru's Resolve Elite Interceptor Fear of Missing Out Flash Conscription Flash Thompson, Spider-Fan Focused Funambulist Fyndhorn Brownie Gerrard's Command Gift of Growth Glamermite Granite Witness High Alert Hyrax Tower Scout Initiate's Companion Inspirit Instill Energy Jandor's Saddlebags Kiora, the Tide's Fury Legolas's Quick Reflexes Magewright's Stone Militia Rallier Mirran Spy Moment of Valor Niblis of the Breath Ornamental Courage Overtaker Prepare // Fight Prepare // Fight Provoke Puppet Strings Puppeteer Quirion Ranger Raggadragga, Goreguts Boss Rally the Righteous Ray of Command Refocus Retreat to Coralhelm Scryb Ranger Seeker of Skybreak Seize the Day Sewer-veillance Cam Soldevi Golem Sparring Mummy Spidery Grasp Spinal Embrace Staff of Domination Steady Aim Stonybrook Angler Teardrop Kami Teller of Tales Temporary Insanity Thassa's Ire The Moment Thousand-Year Elixir Threaten Tidal Bore Tolarian Kraken Twiddlestick Charger Vigean Graftmage

Meanwhile, all around it is teaming with colorful water-life
What would you say is the very best precon of the 2020s so far, from 2021 onwards
If it doesn't help kill the opponent, it's out