Lan Ying had long since hidden himself among the Supreme Saints of the Yanluo Clan. Furthermore, he had concealed himself from the perception of all the cultivators. This was precisely why he was able to injure a Supreme Saint at the Great Perfection stage of the Hundred-Shackle Realm.
Swish! Swish! Swish!
Under Lan Ying's control, the Bloody Slaughter was like a streak of blood. In the blink of an eye, it pierced through the bodies of six Yanluo elites at the Great Perfection stage of the Hundred-Shackle Realm.
Although it was not fatal, it greatly reduced their battle prowess. In a short period, they were unable to refine the killing aura that invaded their bodies and recover to their peak condition.