special illustration rare pokemon cards Eevee ex Prismatic Evolutions #167 PSA 9 Card Gallery | Pokémon TCG:

If a card refers to your devotion to a color, it means the number of mana symbols of that color among permanents you control

Right now, theres very little played that it blocks against, unless you count Raikou- EX using Thunder Fang (rarely), either Eelektross teched into anything-Eels (rare), or few other examples

Box EV Breakdown At approximately $65 expected value per $150 box (~44% return), VSTAR Universe fares better than most modern sets thanks to its high guaranteed hit count and bonus pull chances

In the past, this was either because they were on the Reserved List (meaning they were both old and never to be reprinted) or because they were powerful and highly desirable in a format, whether that be competitive (like Standard) or casual (such as Commander)