kamigawa neon dynasty set booster box Kamigawa: with 0–1 Neon Ink Foil or Foil Magic: the Gathering: Collector Booster

And Terraforming lets you get one much earlier not too much earlier though, as its currently limited to 1 per deck

theres also a host of artifact creatures worth copying, from the humble Construct to the ridiculous Kappa Cannoneer

Bear Ninja Zord ATK/ 1700 DEF/ 200 Lore: When this card attacks or is attacked change this monster into face down Defense Position

Its staggering value comes from the "perfect storm" of a flawless PSA 10 Gem Mint grade on a card from the exceedingly rare Alpha set

Proliferate works best if you have a big board of creatures with counters on them, so it seems like hed be a slam dunk in go-wide and counters strategies, but the problem is that most popular commanders for those archetypes are key to the decks strategy and want to avoid danger by any means necessary