The Commander Volo, Guide to Monsters is not only a powerful commander, it's one that really captures what makes Commander such a fun format
The term "ramp" in Magic: The Gathering refers to any spell card that generates a net positive amount of mana, whether that be through floating mana that expires at the end of the phase, lands placed onto your side of the field (though some count searching up lands to put into your hand as ramp as well), or artifacts and cards that create artifacts that can tap for mana
All of these were printed early on in Magic's lifetime - in Alpha, Beta, or Unlimited - before balance had been fully figured out
There are several cards from this set on the cusp of playability, but they seem to be missing that one element needed to truly tie them together
Tapu Lele GX from Guardians Rising, one of the most iconic cards of the game's recent history, is back
They evaluate cards in a three-step process that consists of authentication, grading, and encapsulation, and their site lists the exact parameters for each number on the grading scale