The exchange of words between the mermaid princess, Serene Oceans and the princess of Tan Clan surprised the others who were together with them. It seems that for the intermediate and major trial killing is a taboo. A fight between two huashen Realm cultivators, can be considered life staking especially for those who just borrowed their powers and wasn't entirely developed by them.
That's why the Mermaid Princess said that her question of asking Tan Bingyu and Yue Huashui to fight her for the trial is a trap. With such unknown results, accidental killing might occur and this will lead to the trial takers being disqualified. Moreover, what they can do is disqualification means death. After all, the one who would punish them might be the owner of this hall which means the Water God himself.
{Enough talking and continue the trial.}
