He was Lord Xander's right-hand man before the city was built, and he still is today
Discussions about ranking the eight Eeveelution alternate arts always feature it.
For bonus fun, once the creatures are past the blockers, but before damage is dealt, you can buff them using a combat trick like Invigorate Double strike is very highly valued by this deck, as it allows both your toxic and your infect creatures to dish out twice as many poison counters
Let me try to break down everything this seems to do from my perspective as a comics theorist
SE Secret Rare STAR Starlight Rare Starving Venom Predapower Fusion Dragon X DARK Level 10 [ DragonFusionEffect ] ATK 3600 DEF 2500 1 DARK Fusion Monster + 1 Fusion Monster (This card is always treated as a "Predaplant" card.) Once per turn, when a card or effect is activated (Quick Effect): You can Tribute 1 monster on either field with a Predator Counter, and if you do, negate the activation
If you want to add this special gold version of Mew EX to your Pokmon Card 151 collection, you wont have to spend that much: in fact, its going for around the same price as the regular Full Art, continuing the tradition of most Secret Rares being quite cheap despite their rarity
