Whoever wins gets the choice of going first or second during the game

Aang's Journey Aesi, Tyrant of Gyre Strait Analyze the Pollen Ancient Greenwarden Azusa's Many Journeys Badgermole Cub Beanstalk Wurm Beanstalk Wurm Benalish Emissary Bioengineered Future Blighted Burgeoning Brutal Suppression Bumi, Unleashed Buried in the Garden Case of the Locked Hothouse Chocobo Camp Crop Rotation Crypt Ghast Dance of the Tumbleweeds Dawn's Reflection Deprive Devour in Flames Double Play Druid Class Dryad of the Ilysian Grove Elvish Guidance Enter the Unknown Escape to the Wilds Exploration Exploration Broodship Explore Fastbond Fertile Ground Flubs, the Fool Fumarole Gaea's Balance Gaea's Touch Gauntlet of Might Gauntlet of Power Ghirapur Orrery Glittering Frost Goblin Ruinblaster Grab the Prize Grow from the Ashes Harrow Hearthhull, the Worldseed High Tide Hugs, Grisly Guardian Icetill Explorer Iridescent Vinelasher Joint Exploration Journey of Discovery Kellan, Inquisitive Prodigy Kellan, Inquisitive Prodigy Kiora, the Crashing Wave Littjara Mirrorlake Loot, Exuberant Explorer Lord Windgrace Magma Rift Magmatic Insight Mana Flare Market Festival Merciless Resolve Mina and Denn, Wildborn Mind Games Moraug, Fury of Akoum My Tendrils Run Deep Nahiri's Lithoforming Naya Nightscape Battlemage Nirkana Revenant Nissa, Who Shakes the World

Fourth Place Fast Lands Andrea Piemonti Modern is mostly a turn 4 format in my eyes
Meanwhile in the world of Commander, spider Fog Arachnogenesis is now a massive $72 after doubling in price this week
Once I broke all this down, the answer seemed pretty clear: I needed to track spells being cast