Among all the records Qin Fengming had seen, there was basically no dedicated method for cultivating Silver Sheath Worms. The usual methods of raising spirit insects were almost completely useless on Silver Sheath Worms.
Back then, True Person Yiyang's soul fragment had also given Qin Fengming some cultivation methods, but those methods were only useful for a few Silver Sheath Worms.
And Qin Fengming had possessed tens of thousands of Silver Sheath Worms from the very beginning.
If he had cultivated them according to the methods taught by True Person Yiyang, then no matter how vast his wealth was, it would have been absolutely impossible for him to advance all the spirit insects to the Adult Stage by now.
The reason these Silver Sheath Worms had advanced so rapidly, apart from Qin Fengming feeding them all kinds of precious pills and spirit herbs without sparing any effort or expense, was also the extremely heaven-defying spirit materials he had obtained.
Ice Marrow, Gangying Stone, Gangyan Sand Crystal, condensed Killing Intent liquid, and Star Coral Crystal—which of them was not an extraordinarily precious treasure?
When the Silver Sheath Worms consumed these things, they were not counted by the handful or the piece, but measured by bushels and hu.
Aside from these precious items, there were also several kinds of demon insects in quantities beyond imagination, often numbering tens of millions or even hundreds of millions. There was also the world's rare Blood Condensation Mountain and the heaven-defying spirit liquid in the little gourd.
Actually, Qin Fengming believed that the Silver Sheath Worms' rapid advancement should also have been related to their frequent resistance against the Heavenly Tribulation and their absorption of the terrifying energy within it.
All these things could be said to be unprecedented among Silver Sheath Worms, whether in the