japanese pokemon 25th anniversary booster box (1 Pack) Card Game Collection S8a Pack (5 Cards Enclosed) : Toys & Games Pokémon fans 25th Anniversary Collection Booster Box

That holds true for the Pokemon TCG as well

Power matters

Making all of your creatures replace themselves buries your opponents in card advantage and makes it hard for them to interact with your board

Well, aside from the making fun of terrible Magic cards, the next time Wizards does a survey to check which old cards we want online (aaaaaaaand maybe tells people about it?), you'll have some idea what cool old cards haven't made it online yet

You want this in a storm shell interested in copying cards like Jeska's Will and Mana Geyser for huge bursts of mana to spend on Reckless Impulse and other card advantage spells