Rise of the Floodborn doesnt just build on the first set of cards in terms of quantity, either
The best spirit commanders are multicolored, which makes sense for Commander, but there are also some interesting mono-color builds
It's remained one of the premier counterspells in Magic, cementing Blue's ability to interact for free
Esper Sentinel, Knighted Myr, and Bottle Gnomes were all also excellent targets

Here are some recommendations for some budget upgrades that fit with the Go Wide strategy, Cat Tribal, or generally good cards: Ramp: Sakura-Tribe Elder, Rampant Growth, Farseek, Nature's Lore, Kodama's Reach, Explosive Vegetation, Skyshroud Claim, Rhonas's Monument, Tempt with Discovery, Urza's Incubator Card Advantage: Rishkar's Expertise, Hunter's Insight, Life's Legacy, Greater Good, Lifecrafter's Bestiary, Sylvan Library Protection: Vines of Vastwood, Heroic Intervention, Asceticism, Leonin Abunas, Fleetfoot Panther, Whitemane Lion Disruption: Enlightened Ascetic, Felidar Cub, Aura Shards, Scavenging Ooze, Watchers of the Dead, Swords to Plowshares, Dromoka's Command, Beast Within, Return to Dust, Wrath of God, Day of Judgment, Austere Command, Rest in Peace, Relic of Progenitus, Nature's Claim, Sylvan Reclamation Recursion: Regrowth, Remember the Fallen, Seasons Past, Praetor's Counsel, Eternal Witness, Skullwinder, Emeria, the Sky Ruin, Emeria Shepherd, Sun Titan, Greenwarden of Murasa Tutors: Survival of the Fittest, Green Sun's Zenith, Chord of Calling, Eladamri's Call, Worldly Tutor Big Hitters: Skyhunter Skirmisher, Adorned Pouncer, Chameleon Colossus, Rhonas the Indomitable, Nylea, God of the Hunt, Ajani, Caller of the Pride, Elspeth, Knight-Errant, Duelist's Heritage, Citadel Siege I Win: Lost Leonin, Grafted Exoskeleton, Berserk, Overwhelming Stampede Infect is a controversial mechanic in Commander, but I would be remiss if I didn't mention how good Lost Leonin and Grafted Exoskeleton are with Arahbo, Roar of the World
