My first actual serious deck was a Cyber Dragon deck (classic and probably power cliffed by Now) which used a variety of fusion monsters and cards like power bond, polymerization, and overload fusion Xyz is really not that noteworthy it's the same kinda spam type gameplay, synchros before them were using with no real substantive difference in how they can be used unlike with pendulums or links
Trevenant in particular is a card that actually did really well at Worlds this year, and it won the World Championships in Seniors last year
No card exemplifies this as well as Shield Sphere
In all honesty, though, I only recommend buying Pokmon cards directly from Amazon, because, unlike eBay, third-party sellers dont post pictures of the product or the cards you are actually buying
Though nothing is guaranteed, this set's relative stability is likely to hold for the foreseeable future