9. Brahmashirsha Astra - The Brahmashir? astra, a devastating ancient Indian weapon, surpasses even the mighty Brahm?stra in power. With its four heads resembling Lord Brahmas, it can be channeled into any object, even a blade of grass. When activated, it engulfs the sky in flames and thunder, shaking the earth. It leaves utter desolation, preventing even a blade of grass from growing for the next 50 Brahma years, over 150 trillion human years. Knowledge of this weapon was possessed by sage Agnivesha, Lord Parshurama, Pitamah Bhishma, Guru Drona, Arjuna, Karna, and Ashwatthama.