The Paleo-beast Realm had various species. They were quite diversified. Some species were weak in battle but were bestowed with miraculous skills, such as the Bond beasts.
But there was mutual promotion and restraint in the world!
In the Paleo-beast Realm was a species that was the natural enemy of the Bond species. The former was known as the Nose Rat. This species had good noses. When they learned the target's scent, they could dig out the target even if it was buried miles underground. It just so happened that this species was not weak in battles.
With the Nose Rat's help, all the Bond beasts were discovered—all of them. Without the Bond beasts, no more information could be gathered.