There existed a rule inside the Woods Ocean Ancient Path. There was no limit as to how many Grade 2 beasts could fight a group of cultivators, but for Grade 3 beasts, they could only send out as many Golden Core Sages as the cultivators had.
As there were only seven Golden Core Sages in Chen Jingzhai's group, it meant that the demonic beasts could only send out at most seven Grade 3 beasts at once. Having 20 appearing together and attacking the group of cultivators was against the rule and the punishment would be heavy.
"The rule? We are the rule! We Giant Rhino Tribe decides what's wrong or right in this forest!" the leader scoffed. "Unless all of you want to die here, I suggest you let my friend go this instance!"
To the Giant Rhino Tribes, having one of them getting tamed was a huge embarrassment.
They would've been humiliated to a point of no return if the cultivator decided to keep it and did not return their friend.