Enter this pair of uncommons
Wizards had only officially started supporting the format a few years before and didn't really know how to design for the format, which led to a string of super-overpowered mechanics and cards
While a 3/3 for 4 is indeed understatted, Sazhs triggered ability means that the card can also snowball the game out of contention if left unchecked
You can dish out +1/+1 counters and ramp faster since all your merfolk explore, and Hakbal doesnt need you to tap anything to accelerate
I imagine this logic will extend to Historic, Timeless, and Brawl too once the post-release dust settles
Just as Pokemon TCGs early supplemental sets (Gym Heroes, Team Rocket) maintain nostalgic value decades later, EB-01s inaugural position ensures sustained interest from completionist collectors pursuing full One Piece product lineage