A side collection of mine is an obscure Japanese set called Adventure Cards
You can distinguish a proxy and the genuine MTG card by looking out for various factors such as the cardstock texture, does it feel like your existing MTG cards
Its ETB effect means it wont make the best commander (unless you invest heavily in ways to bounce it in mono-red), but nothing beats hitting Muxus for free thanks to Warren Instigator and Goblin Lackey
Conspiracy Theorist is a card that I can see getting more relevant in the future, but for now, it puts in lots of work in my Anje Falkenrath and Prosper, Tome-Bound decks
One standout feature is its streamlined card collection system, making it easy to acquire desired cards without relying on luck-based draws
Time will tell, I suppose