Casting 4-mana noncreature spells isnt easy: If they dont affect the board in a meaningful way, you often fall too far behind your opponent
It introduced four Radiant Pokemon (Venusaur, Blastoise, Charizard, and Eevee), the peelable Ditto gimmick that hides Ditto under common Pokemon cards, and a pack structure that guarantees two holos per pack instead of the usual one
Envoy of the Beginning allows you to banish any monster on the field, face down or face up
The likelihood of your childhood card being centered well and undamaged coming out of the pack was very low
Radiant Greninja and other draw engines accelerate setup, and the decks simplicity as a Stage 1 evolution offers consistency
Its rarity and detailed illustration make it highly collectible