In any casual metagame, you will find a number of planeswalkers, and this is especially effective against Commander decks where players could have 6 or 8 planeswalkers in their deck without even trying
Organize your cards by category, keep them upright in rows, and use cardboard dividers to separate sections
Another variant, and the one that's more relevant here, jams in as many 0-cost artifacts as possible and plays Weapons Manufacturing, spitting out a load of Munitions tokens
Cards in this accessible price range are also easy to find on Japanese marketplaces, which is where many overseas collectors end up looking
Why Proliferate Is Stronger Than It Looks At first glance, Proliferate doesn't seem particularly exciting as adding a single counter hardly sounds game-breaking
Alternatively, you could ignore all this: there's plenty in this package to make an effective stand-alone board game that is never expanded