they come with downsides, like Day's Undoing
But if someone builds their deck to do that intentionally, that's the no-no
Sinistcha ex #210 Pokemon Twilight Masquerade Keep track of your collection value over time
If you dont sleeve all of your aspect cards at all times (we dont!), you can get away with far fewer sleeves, and the bare minimum you can go with is 2 boxes of 100 sleeves, which is enough to sleeve 2-3 (possibly 4, depending on the size of the encounter deck) hero decks and an encounter deck with some change
Weve gotten our eyes on the third Radiant Kanto Starter set
It could also be notable that the card type is "Artifact", as this was before they started dividing artifacts into Mono, Poly and Continous (Chaos Orb is of course printed as Mono Artifact)