Shiroratna/Shiromani

The protecting jewel (ratna/mani) of Ashwatthaman.

Because he wanted to kill the son of Abhimanyu in Uttara’s womb, Krishna took it from him.

To read the story visit
http://talesfrommythology.blogspot.com/2011/04/last-kaurava-general.html?q=The+Last+Kaurava+General