In the beginning, Lu Weinan would come back at times. Recently, however, Han Sen rarely saw him. Han Sen did not know if Lu Weinan had given up or gone to seek others' help.
With no one around, Han Sen thought about using his bow and arrows to shoot at the sacred-blood creatures. However, he did not even have a sacred-blood beast soul arrow. Even if he could hit the creature, a mutant arrow could not cause enough harm anyway.
Luckily, Han Sen had reached the first phase of Yin Yang Blast and was ready to try it out.
Taking a deep breath, Han Sen carried the diamond sword on his back and shapeshifted into the bloody slayer. Clenching his fists, he threw himself at the sacred-blood creatures.
The reason why he did not use the diamond sword was not that he did not want to, but that his level in Yin Yang Blast was not enough for him to integrate the forces in his weapon.