You've got more to attack and block with, more to sacrifice, and sometimes they can even be used to help pay for mana costs
Bad Primes that easily go for 1 pack include just about everything other than Donphan, Mew, Magnezone, Yanmega, Gengar, Typhlosion, and maybe Kingdra
for example, I didnt see any way to make a battle, double-faced card, or a traditional split card
Endurance is another valuable evoke card with flash, wiping out one player's library to slow down graveyard strategies
As a card to use during your games of One Piece, its no slouch with the Rush keyword (allowing it to attack on the turn its played without any delay) and the ability to stop your opponent from activating Blocker