Sadly this is just very low tempo and pretty low powered

Commander (1) Creature (32) Nezumi Graverobber Skullbriar, the Walking Grave Riddlekeeper Fleshbag Marauder Eternal Witness Troll Ascetic Yavimaya Elder Solemn Simulacrum Brawn Wonder Sewer Nemesis Gravedigger Lhurgoyf Dreamborn Muse Mortivore Desecrator Hag Mulldrifter Acidic Slime Vulturous Zombie Dark Hatchling Extractor Demon Scythe Specter Wrexial, the Risen Deep Vorosh, the Hunter Triskelavus Slipstream Eel Butcher of Malakir Patron of the Nezumi Damia, Sage of Stone Szadek, Lord of Secrets Avatar of Woe Artisan of Kozilek Instant (4) Tribute to the Wild Spell Crumple Fact or Fiction Relic Crush Sorcery (12) Minds Aglow Shared Trauma Sign in Blood Stitch Together Cultivate Windfall Buried Alive Syphon Mind Unnerve Rise from the Grave Syphon Flesh Living Death Enchantment (5) Vow of Wildness Vow of Flight Vow of Malice Memory Erosion Grave Pact Artifact (6) Sol Ring Dimir Signet Golgari Signet Lightning Greaves Simic Signet Oblivion Stone Land (40) Barren Moor Command Tower Dimir Aqueduct Dreadship Reef Golgari Rot Farm Jwar Isle Refuge Lonely Sandbar Rupture Spire Simic Growth Chamber Svogthos, the Restless Tomb Temple of the False God Terramorphic Expanse Tranquil Thicket Forest x8 Island x8 Swamp x11 Commanders, Themes, and Strategy Here in first place we have No products found., the Sultai graveyard deck

The Beast, Deathless Prince rejected Lorcana card, Im sure A threaten Commander that isnt Brion Stoutarm
Any power- or toughness-setting effects that start to apply after Unctus's Retrofitter's ability resolves will overwrite this effect
Of course, there are downsides with this card
These decks are packed with huge cmc spells and plenty of ways to cast them for less than their cmc, such as using Fist of Suns or adding discounts to them (Dig Through Time)