The battle corpse sect was a ghost cultivation sect. They were very strict with their disciples. If a disciple failed to complete the mission given by the sect on time, the punishment would be very heavy. Some disciples would even be refined into battle corpses because they failed the mission. This was very terrifying.
This time, Ma Long and Liu Cai were able to follow Zhao Hai on this mission not because they were strong, but because they were at the harmonious Soul Stage, the same as Zhao Hai. Furthermore, they were both rogue cultivators, so they were more familiar with the workings of rogue cultivators. That was why they were chosen to take on this mission.
Ma Long and Liu Cai were very clear that if they failed this mission, they would not have a good ending. Zhao Hai had Wei Tiande behind him. As long as Wei Tiande was there, Zhao Hai would be fine. On the other hand, they had no one behind them. When the time came, they would be the unlucky ones.