Textbooks have often mentioned that these Void Demons, upon death, congeal a special crystal within their bodies, which encompasses the Void Energy they've absorbed throughout their lives in the void space, known as "Void Crystals."
Due to their extreme rarity, the value of these Void Crystals is exceptionally high. It's said that the enhancement of all spaceborne components requires these Void Crystals.
Bearing this in mind, within the realms of Torch Human Civilization, the price of Void Crystals has been driven to extraordinary heights, having reached a point where one Zero Rank Void Crystal can be exchanged for a strand of First Rank Floating Land Origin, and one First Rank Void Crystal can be exchanged for a strand of Second-Rank Floating Land Origin.
At the moment, the bodies of these over one thousand Void Demons are evidently a vast fortune, which is why Song Chi didn't waste any time and began gathering these corpses immediately.