How to do well the task of seven show III's Milk Little Orange Wu?

Collect stones and go to Xiaobaiyan, and then go to YX Salt-free Island. After entering the door, there is a little LOLI on the right. Click on her to choose Yunfu, and then she will be sent to the battle site of BOSS. There are three NPCs around. After using Jianghai exorcism, three NPCs will be given blood, and NPCs will give you an extra BUFF Sword God without me. The milk show needs to grind the BOSS to death and add your blood at the same time, and they will continue to brush NPC. If it continues to break, NPC will not move. Without me, the sword god's BUFF is gone, so it can't be broken continuously. After grinding for more than ten minutes, the BOSS basically died, and then the upgrade task is the same, but there will be more blood.