Gisa, Glorious Resurrector is here to present a simple counterargument to that: Just sacrifice your opponents things
Shantotto, Tactician Magician and The Emperor of Palamecia each care about the amount of mana spent to cast them
Keep in mind that Mox Opal doesnt produce mana unless you have two other artifacts in play, and you can always chain together two Opals to power out a threat if necessary
The Antiquities designers were nice enough to also give deck builders a tool to make sure that they weren't decked, a little artifact called Feldon's Cane
If accurate, that would actually made the entire set of 77 Gold Chocobos worth $3,080,000 if they all fetched a similar amount, dwarfing what the One Ring previously sold for
The actual spell causes creature cards to cost 2 more to cast (yours, too), and I like the art showing a planet trapped in a flask