Another is to somehow incorporate untradable cards as promos, prizes, and / or rewards (which would be harder, since it would still have an economic impact)
Pyrogoyf The Warstorm Surge aspect of Pyrogoyf really heats things up for this list which already wants to be played with full playsets
Collector-focused rarities (SEC / SP / special designs) and themed releases can also attract strong collector interest
Now it's time you freshen up on your settings and hop into a play mode on Arena
Leonardo, Cutting Edge Japan Showcase Fracture Foil - $339.99 It's hard to argue against Orzhov being the biggest benefactor of the TMNT set release if you look at the best TMNT archetypes, but that also means there are some powerful mono-white and black cards that will shake up some existing decks, and Leonardo, Cutting Edge, is one of those cards
It also happens to be a powerful payoff for both creature types