These cards are also worth tracking down as a collector
While English cards enjoy broad familiarity and market recognition in the West, Japanese cards appeal to dedicated collectors who value exclusivity and aesthetic differences (like silver borders or alternate art styles)
It requires building around since you can only cast it from your graveyard, not your hand, so cards like Entomb / Jarad's Orders / Wargate are needed, but it's worth it: with Haakon on the battlefield, not only can you cast any Knights from your graveyard like Knight Exemplar or changelings like Mirror Entity, but Haakon can also cast tribal instants like Crib Swap to repeatedly exile threats or Blades of Velis Vel, which together with The Ur-Dragon and Morophon, the Boundless lets you cast Blades infinite times for infinite power
That card must be an Angel, Demon, or Dragon creature, and it's automatically tapped and attacking along with Kaalia
I also focused much more on Elves and Elf-adjacent cards