Murdering Heart Powder is the poison used to kill Yun Che during his first life. It's 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. Yun Che was poisoned with this powder on his wedding day when he was 16 years old.