Ahmad Shah Durrani's Pesh-Kabz

Origin
Ahmad Shāh Durrānī (1722 – 16 October 1772), also known as Ahmad Khān Abdālī, was the founder of the Durrani Empire and is regarded to be the founder of the modern state of Afghanistan.   

Ahmad Shah enlisted as a young soldier in the military of the Afsharid kingdom and quickly rose to become a commander of four thousand Abdali Pashtun soldiers. After the death of Nader Shah Afshar of Persia in June 1747, Abdali became the King of Afghanistan. Rallying his Pashtun tribes and Baloch allies, he pushed east towards the Mughal and the Maratha empires of India, west towards the disintegrating Afsharid Empire of Persia, and north toward the Khanate of Bukhara. Within a few years, he extended his control from Khorasan in the west to Kashmir and North India in the east, and from the Amu Darya in the north to the Arabian Sea in the sout  h. Ahmad Shah's mausoleum is located at Kandahar, Afghanistan, adjacent to the Shrine of the Cloak in the center of the city. Afghans often refer to him as Ahmad Shāh Bābā ("Ahmad Shah the Father").   

On his way back from one of his battles, he attacked the Golden Temple in Amritsar and filled its sacred pool with the blood of slaughtered cows.

Effects
When this artifact or its sheath come into contact with water, that water will become biologically identical to cow blood.