C41 Dawn Rainbow Bridge.

Upon hearing the question, Lee Laogui furrowed his brow and asked, "What kind of Medicine Pill necessitates the use of slaughter water?"

"Fool Loong, regardless of the Medicine Pill, you should be able to purchase the water of slaughter from the major auction houses in the future. Don't even think about venturing into the Heavenly Profound Sword Pool Holy Land's demon-slaying grounds. If you do