Water To Blood.

Shi Lang and the seven squad leaders jumped, and the people on the sniper rifles aimed at the guards closest to the place their leaders would land. They shot the people with the tranquilizers filled with poison. 

The seven squad leaders all had equipment that allowed them to evade the senses of an Immortal Emperor as long as they were not too audacious with their movements. The guards were surprised by the sudden sting, when Shi Lang and the seven people appeared beside them and cast an eye technique. 

They were going to use these patroling guards to pass on the poison to everyone below the Immortal Emperor level. From what they knew, Zhu Family had three Immortal Emperors, including Elder Tie. Due to recent events the Zhu Family had the entire mansion guarded.