Ragavan once again has us asking, How much should one Magic card do? and also, with the Ragavan-Bonobo Index, How much should one Magic card cost? The answers are still unclear, but at the very least, Ragavan creates a lot of interesting lines, fits in a variety of decks, and promotes interaction from the start of the game
It was also much better than the Mewtwo Wars format that came after, which was completely focused on Basic Pokmon (and one specific Basic Pokmon, for the most part)
Shiny Caterpie, Shiny Forretress, etc
Also, while its great to get lucky and have the rarer, fancier versions of the cards in the deck, its not necessary as long as you can get the base versions of all of them
Coalossal VMAXs Eruption Blast only requires 1 orange Energy to use, and it has the potential to deal up to 130 damage and gain Energy if it's the top card of your deck