I opened a Korean Double Crisis booster box when I was looking for the Seviper a few years back and was able to pull the entire set except for one of the Trainer cards (Team Aquas Secret Base), which I was able to buy as single a few months ago
This has been the year-ish of the TCGs own card designs surging back into relevance, as not since the heights of Burning Abyss have we seen such dominance in defiance of expected OCG imports
It can also be useful in dredge decks to help fill the graveyard
Most of the new set Adventure cards are not as good, but having some card advantage and cost reduction on the Command Zone might push them to be playable
Exile without countering to get around uncounterable can hit multiple cards on the stack, these things matter, and the time youre most likely to be able to cast it is the time you most want towhen someones trying to win, especially in the very early game
This cute little T-posing Spirit interacts with modified creatures and cards from exile, two things that Flamewar cares about