Mainboard (61)
Creatures (10)
Instants (2)
Sorceries (10)
Artifacts (5)
Enchantments (8)
Boros Energy is an aggressive creature deck that can kill you with Goblin Bombardment before you assemble Primeval Titan; Firespout is excellent as a one-sided sweep since your Primeval Titan and Arboreal Grazer survive it and it kills Ragavan, Guide of Souls, and Ocelot Pride tokens. Dismember answers Voice of Victory and Ranger-Captain of Eos before they can generate value. Cultivator Colossus and Aftermath Analyst are win-more cards when you need to first survive; Scapeshift is your secondary win condition and can be trimmed to add interaction. They board Blood Moon post-game one, so prioritize finding basic Forest early.
Jeskai Blink is interactive with Solitude and Prismatic Ending; Dismember kills Quantum Riddler and Phelia at instant speed before they generate blink value, and Vexing Bauble taxes their cantrip-heavy spell chains. Bojuka Bog can be fetched mid-game via Primeval Titan to exile their Fable tokens or any graveyard-based recursion. Cultivator Colossus is win-more when you need to survive their early pressure; Aftermath Analyst and Mirrorpool are utility cards that don't impact the race. Primeval Titan is still your key card — fetching Hanweir Battlements gives haste and fetching Simic Growth Chamber accelerates future turns.
Affinity relies on Mox Opal for explosive starts and Kappa Cannoneer for a hard-to-answer threat; Collector Ouphe shuts off Mox Opal and all of their artifact activations entirely. Force of Vigor destroys Mox Opal at instant speed for free, and Dismember kills Kappa Cannoneer or Emry at instant speed. Vexing Bauble taxes their zero-cost artifacts that chain together. Cultivator Colossus and Aftermath Analyst are too slow; Scapeshift is your alternate win condition that can be reduced since Primeval Titan is the more impactful route. They board Harbinger of the Seas so be ready to sacrifice fetchlands to find basic Forest before it resolves.