Back when the human race was flourishing, it was possible to attempt such feats. At that time, there were many Mages and Diviners among the human race, and as long as the price paid was significant enough, they would be able to discover something. But now? Don't think too much about it, unless the human race can produce some special prodigies...
However, the present era has already seen the rise of three Daughters of Heaven's Mandate, which means the probability of other special prodigies appearing isn't high. Maybe their offspring could have potential, but it's obviously too late now; that would at least take a decade or more.
If the Proxy Agent of Dusk, if the daughter of Heaven's Mandate of this world, should have any offspring, as long as they are raised properly without going astray, wouldn't the future of the human race be more stable?