Finneas, Ace Archer is a no-brainer
The 15 Commons that got the "light and dark treatment" are: Army of Allah, Bird Maiden, Camel, Erg Raiders, Fishliver Oil, Giant Tortoise, Hasran Ogress, Moorish Cavalry, Nafs Asp, Rukh Egg, Piety, Oubliette, Stone-Throwing Devils, War Elephant, and Wyluli Wolf (Source)
Unfortunately, it has a x2 Water Weakness, meaning Gyarados, Kingdra Prime & LA as well as Palkia G LV
It is cheap enough that the tempo concession is minimal and it is clean and unfettered sufficiently to be playable in most black decks
Its basically a colorless Legion Loyalty for artifact creatures, but at a cheaper cost

Table of Contents show The Deck Rat Colony | Illustration by Suzanne Helmigh Commander (1) Creature (46) Accursed Marauder Ayara, First of Locthwain Blood Artist Boggart Trawler God-Eternal Bontu Grim Haruspex Karumonix, the Rat King Lord Skitter, Sewer King Marrow-Gnawer Midnight Reaper Ogre Slumlord Plaguecrafter Rat Colony x32 Vengeful Bloodwitch Zulaport Cutthroat Instant (3) Fell the Profane Hagra Mauling Plumb the Forbidden Sorcery (2) Agadeem's Awakening Bloodline Bidding Enchantment (1) Artifact (14) Altar of Dementia Arcane Signet Charcoal Diamond Fellwar Stone Gathering Stone Jet Medallion Magewright's Stone Mind Stone Phyrexian Altar Sceptre of Eternal Glory Skullclamp Sting, the Glinting Dagger Thought Vessel Throne of Eldraine Land (33) Cabal Coffers Castle Locthwain Cavern of Souls Crypt of Agadeem Phyrexian Tower Secret Tunnel Spymaster's Vault Susur Secundi, Void Altar Swamp x22 Takenuma, Abandoned Mire Urborg, Tomb of Yawgmoth War Room Verminister leads a Rat Colony deck with an emphasis on sacrifice effects to maximize the potential of Rat King, Verminister
