I used to collect minerals & fossils as a kid (and still do, but I very infrequently add new items to the collection these days), and I also like visiting natural history museums
In our studio, we have witnessed firsthand how card grading, scarcity, and historical context drive market prices for collectors in the USA, Canada, Europe, Australia, and the UK
Because you just need treasures from any source to buff creatures, this gives you a ton of options with combo potential, especially with Mari and cards like Deadly Dispute or Academy Manufactor to increase the value of all of your various effects that rely on treasures
While there isn't a lot to him, there's no doubt he's as flashy as they come, and to this day still has that magical "WOW!" factor whenever he hits the board
Other cards in the set require jumping through some hoops before the preparation triggers