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
Blue is even starting to get some impressive looking creatures which all ends up making blue a very strong colour in cube for all types of deck
Can they bust up enough tiers to matter on the backs of Eladamri, Korvecdal, Priest of Titania, and Wirewood Symbiote
Agate Instigator is a kill card masquerading as a minor nuisance
The fact that Mend the Wilds is an instant makes this card a lot better, since you can cast it right before your turn and most likely get to draw whichever permanent you got back from your graveyard
Spells can also be used to boost minions or perform various other abilities