Maker of the Ghostly Beast Weapon of Holy Milk

The alchemist of the Stigmata traveled through time and became the deadly Shasha, thus opening up the correct path to alchemy. There are various materials required, and the most scarce one is "Sacred Milk". Where is the golden Sacred Milk? Is it me from K? Is it Bishamon, the royal sister in Noragami? Is it Xiao Meng in Qin Shi Mingyue? Is it Rise Kamishiro from Tokyo Ghoul? Or Esdeath in The Crimson Eye? This problem is serious...... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.