Like most Pokmon cards, the value of Absol 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 (Secret Wonders)
To keep the Final Fantasy flavor, most of them have Summon in the name , like Summon: Bahamut or Summon: Knights of Round
He plays nicely into that space
This is where the Cube-like part of the format kicks in, as all a Battle Box needs to be is at least 200 or so cards, although you can get up to, well, as many cards as you want, really
In all honesty, I personally believe they belong in our list of the best Pokmon cards ever, purely for looks (and they look even better in person, believe me)
The majority of cards in the Scarlet & Violet - 151 packs are common, while the rarest cards, such as Mew ex and Charmander, have low pull rates