Ashvatthama

Ashavatthama is a character in Indian mythology. He was a son of Dronacharya and Kripi. He was an important personality in Mahabharat war. He was in Kaurav's side.
He entered Pandav camp with two other warriors at night and killed Dhrishtdyumna. They also killed the five sons of the Pandav. They also killed Parikshit who was in his mother's womb at that time but saved by Lord Krishna later.