The reason each team entering the Berserk Beast Realm was limited to three cultivators was simple—when too many cultivators entered the Secret Realm at once, the realm's unstable energy would react violently, scattering everyone across random locations.
To prevent this chaotic separation, only three cultivators were allowed to enter together. Because of this restriction, the sect required cultivation families to form teams with no more than three members, ensuring they could stay together upon arrival.
Like the three cultivators from the Blood Claw Tribe, there were two more teams, one belonging to the Moonshadow Tribe and the other belonging to the Bonepiercer Tribe.
These three teams joined the [Beast Extermination Trial] through the three cultivation families Wu, Zhao, and Han respectively.
They seemed like they were searching for something or, to be more specific, for someone who was carrying that something using their own tracking methods.