Story of Prativindhya
Prativindhya was the son of Yudhishthir and Draupadi and was the eldest of the Upapandavs. At birth, it was prophesized that the kid would grow up to be like the Vindhya mountains in knowledge of the weapons of his enemies; hence the name Prativindhya. On the 18th day of the war, Ashwathama (along with Kritvarma and Kripacharya) attacked the Pandav camp in the night and killed a lot of warriors. Prativindhya was killed fighting against Ashwathama during this attack.