Like most One Piece TCG cards, the value of Kaido depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Starter Deck 9: Yamato)
7 Threads Of Disloyalty, By Vongiae Choi While most of the Amonkhet Invocations zoom things out, working in a larger-than-life scale appropriate for the Gods, Threads of Disloyalty does the opposite, getting right down into the human drama of the blocks second act
Once he bottoms out, perhaps next July, hell start rising and wont stop until either $50 or a reprint
GX has progressed to the point Duel Disks are mass-produced and everyone owns one, and the Duel Disks have a much more streamlined and compact design as well
Not necessarily over-powered cards (since Standard will be adding enough of those, apparently) but really splashy finishers (like Ulamog, the Ceaseless Hunger) and build-around me cards, like these: Like I said, pretty awesome cards