These aliens typically possess traits such as rapid reproductive cycles, high single-birth rates, short development periods, and excellent genetic bloodlines, all designed to allow for quick and continuous output.
This was precisely why the Song family was willing to spend a significant fortune modifying nine ordinary Second Rank Floating Lands and one Third Rank Floating Land, using them to raise these alien species. If this were done in the outside world, it would undoubtedly be considered an extravagant move.
However, within the Song family itself, merely ten Floating Lands for raising creatures still fell far short—it simply wasn't enough. The reason? The number of Song clansmen was way too large. First Rank clansmen numbered in the tens of thousands. With such a staggering base of First Rank Torch Ship Captains, the number of Second Rank clansmen couldn't possibly be much lower.