I might be able to see this perspective if the only counterfeiting problem involved dual lands, Power Nine cards, and other absurdly expensive, unreprintable Reserved List cards, but the demand for counterfeit Standard cards, $15 Commander cards, and Pauper staples works against the argument that the fake card problem is just about $600 Underground Seas and $2,500 The Tabernacle at Pendrell Vales
With Retriever and other pieces, you can do things like draw your deck and gain near-infinite life: 9
For example, if your 6-mana Rhythm gets a 4/4, you can cast Rhythm for X=6 minimum the following turn thanks to harmonize
If it's a creature card with power less than or equal to Grenzo's power, put it onto the battlefield
Whether you just want to slot this as a value piece in case an opponent is trying to run away with the game by being a little too greedy with their card draw, or you want to make this part of your main strategy with commanders like Sheoldred, the Apocalypse or Nekusar, the Mindrazer , Orcish Bowmasters is going to shoot a lot of damage around the able
The strategy revolves around cheap, efficient creatures and disruptive spells, and it aims to win by applying pressure while it slows opponents down with counters or bounce effects