You can play the Emperor in aggressive or midrange decks too, enhancing your little dudes with +1/+1 counters or making more tokens
Aeve, Progenitor Ooze | Commander | Stephen Johnson Commander (1) 1 Aeve, Progenitor Ooze Creatures (28) 1 Acidic Slime 1 Ancient Ooze 1 Beast Whisperer 1 Bioplasm 1 Biowaste Blob 1 Caustic Caterpillar 1 Corrosive Ooze 1 Eternal Witness 1 Experiment One 1 Fyndhorn Elves 1 Gluttonous Slime 1 Gobbling Ooze 1 Green Slime 1 Inexorable Blob 1 Karametra's Acolyte 1 Manaplasm 1 Mwonvuli Ooze 1 Nyxbloom Ancient 1 Oashra Cultivator 1 Ochre Jelly 1 Predator Ooze 1 Sakura-Tribe Elder 1 Slurrk, All-Ingesting 1 Solemn Simulacrum 1 Splitting Slime 1 Spore Frog 1 Temur Sabertooth 1 Wood Elves Instants (7) 1 Beast Within 1 Early Harvest 1 Heroic Intervention 1 Inspiring Call 1 Momentous Fall 1 Reclaim 1 Return to Nature Sorceries (14) 1 Broken Bond 1 Cultivate 1 Full Flowering 1 Gelatinous Genesis 1 Kodama's Reach 1 Miming Slime 1 Overwhelming Encounter 1 Overwhelming Stampede 1 Rampant Growth 1 Revive 1 Shamanic Revelation 1 Slime Molding 1 Three Visits 1 Triumph of the Hordes Enchantments (9) 1 Bear Umbra 1 Eladamri's Vineyard 1 Food Chain 1 Greater Good 1 Guardian Project 1 Gutter Grime 1 Ooze Flux 1 Sight of the Scalelords 1 Unnatural Growth Artifacts (6) 1 Arcane Signet 1 Liquimetal Torque 1 Mind Stone 1 Rhonas's Monument 1 Sol Ring 1 Thought Vessel To push this list up in power level, you'd definitely want to load up on mana-positive rocks, lower mana creatures that are much less oozy, and more card draw
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The Spear destroys any non-land permanently at instant speed, and it's not impossible to get that two cost reduction
Tinker Bell, Giant Fairy is one of the first cards that may come to mind
