The tall man bought a lot of slaves before he came in. The only purpose of buying these slaves was to send them to the dead fragment area for pit filling.

there are many dignitaries like this every time they search for treasures. Last time, he successfully filled in a middle-sized pit with a thousand slaves and made a fortune. So this time he played the same trick again. After entering the ruins, he left the team alone, looked for the trap that was going to die, and continued to fill the pit.

because there are so many slaves, it's too complicated to forge the slave seal one by one,...