Murdering Heart Powder

Description
Murdering Heart Powder was made by combining a unique soul grass and the purple striae from a cherry-apple tree. If dissolved in water, the poison is colorless and tasteless. A person would lose his life ten seconds after the poison entered the body and nobody would know the cause of death for it was also a traceless poison.

History
Xiao Che was killed with this before reincarnated as Yun Che.