Voidborn isnt awful as far as Standard goes, but the fact that this creature needs to compete with Sephiroth, Fabled SOLDIER means it will probably never see any play outside of very focused archetypes that want more than four copies of this effect
Its also important to note that only 1,100 copies of Alpha Black Lotus were printed, so even if you take the absolute lowest price, it adds up to more than $12,000,000 USD to buy every copy of this card that ever existed from the oldest set
Laboratory Maniac is not strictly worse than Thassa's Oracle, seeing as some combos require you to have this card in play and draw cards later
Even better are his not one, but two useful attacks, with the second being particularly deadly
Starting as one of the best decks, then gaining an entire clan worth of support, and this is surely going to be one of the defining day one decks
When you think about expensive old cards, whats the first thing that comes to mind