"Cruel, bloody, and increasingly violent
I feel a bit bad for murdering them, but robbing them and earning more points is more important than their lives.
I might be able to do the same in the Magnificent Flame Sect, but there's a restriction to what I can do there. I am only able to act freely here in the Sunshine sect.
I must act fast before the elite that's guarding this place returns. When he does, he'll definitely find out that I'm an imposter and bloodshed will be unavoidable then. After that, I'll rob and kill the elite, and this will be the end of my fruitful trip.
Lin Fan made use of the Imperial Cauldron of Heavenly River to wash the boat. He cleaned the bloodstains and washed the corpses down into the abyss.
The treasure of the Oceanus Sect is indeed useful. Not only I can bathe in it, but I can boil soup with it or use it to clean up the evidence too.