Cards are typically numbered in a specific order within a set: Grass-type Pokemon Fire-type Pokemon Water-type Pokemon Lightning-type Pokemon Psychic-type Pokemon Fighting-type Pokemon Darkness-type Pokemon Metal-type Pokemon Dragon-type Pokemon Colorless-type Pokemon Trainer cards (Items, Tools, Supporters, Stadiums) Energy cards Secret Rares: Numbers Above the Set Count This is one of the most useful things the collector number tells you
Agate Instigator is a kill card masquerading as a minor nuisance
Returning favorite Proliferate rains counters on creatures, players, or planeswalkers, that already have them
This Umbreon, in particular, has an interesting floodgate ability in Dark Gaze
Also changing: Pokemon Tool cards
Can they bust up enough tiers to matter on the backs of Eladamri, Korvecdal, Priest of Titania, and Wirewood Symbiote