When they didn't sell as well as small expansions, they were deemed a failure, and the Un- sets were permanently shelved
The gouging became inescapable
Four tokens for 5 mana is also a fine rate, so this ends up decent, if unexciting
Skip the $20+ cards (Thrumming Stone, Coat of Arms, Cover of Darkness) and the deck still hums: Commander: Karumonix, the Rat King (~$1) Engines: Pack Rat (~$3.30), Piper of the Swarm (~$3), Ogre Slumlord (~$0.45), a couple of Relentless Rats / Rat Colony (~$56 each cap the copies to stay on budget) Payoffs/utility: Crypt Rats (~$0.50), Nezumi Bone-Reader (~$0.40), Bontu the Glorified (~$3) as a sac outlet, Throne of the God-Pharaoh only if budget allows The rest: cheap black removal, Swamps, and a Sol Ring The whole list comes in well under $50, and it scales up gracefully add Marrow-Gnawer and Thrumming Stone later and the same shell jumps several power levels
It does still have plenty of suitable cheap attackers to contribute though means youre still viable if white or green end up heavily contested
If you've got early artifact mana and your opponent doesn't, chances are you'll win