This already existed as the heavily played four mana to drop and four to use and colorless Quicksilver Amulet
It's this scarcity that makes them so highly desirable though, with some players using them to flex their incredible luck (or, in a lot of cases, the thickness of their wallets)
To appeal to those with a nostalgic sense of longing, or even those with a memetic sense of humor, Wizards has printed cards with white borders in MB2
For example, if a player casts Naturalize ("Destroy target artifact or enchantment") targeting an artifact, Glimmervoid Basin's first ability will copy it for each artifact and enchantment it could target (and each copy will target a different one of those), not just for each artifact it could target
If, or rather when, this happens, we may see Mirko massively jump up in price