If you pay one White mana and tap them you can sacrifice an Artifact to Search your library for an Artifact card with mana value equal to 1 plus the sacrificed Artifacts mana value
Theres also the fact that, while many players are critical of Wizards trying to squeeze every penny they can out of players, that ultimately fans of MTG need the company that makes the game to be successful so they can keep printing cards
While there arent many Eeveelution decks right now, some Japanese players have tried to field a Flareon ex Jolteon ex deck to middling success in City Leagues
all big hitters in the Pokemon universe, so what set Charizard apart and made it the most valuable
Which doesn't surprise me, as it was made to order
Every time Ashcoat attacks or blocks, he empowers every other Rat you control with +X/+X equal to the Rats you control