Every subtype plays differently, and knowing how they evolve or interact is what makes building decks exciting
When you're looking at the cards, you want them to be devoid of stains, misprints, and folds or bends
UPDATE: Straight from the Pokemon Company itself, the set contains: - 16 Pokmon V and 14 full-art Pokmon V, such as Toxtricity V, Dubwool V, and Boltund V - Seven Pokmon VMAX including Toxtricity VMAX, Copperajah VMAX, Dragapult VMAX, and the final Evolutions of the first partner Pokmon of Galar - Over 15 Trainer cards and four full-art Supporter cards - Four new Special Energy cards
Any high-end Mewtwo card tends to draw interest, and this being one of the few Mewtwo special arts in the modern era makes it extra significant
A risky effect, but not the worst in the world