Miracle Fusion, one of Jadens most powerful spells, allowed him to use those creatures again
In short, to keep Magic: The Gathering fresh you have to play it competitively, in draft formats and playing within a single set or at least within the current standard (the last 3 sets + the core set for the year) In comes MTG: Arena
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Now, keep in mind that this is a Japanese starter set, which means you cannot use this deck in most professional matches where English cards are the norm, unless special exceptions apply
Because it was never included in standard booster packs, only a very limited number of copies were distributed, making it extremely rare
This cards price once put it beyond the reach of many players