I have written on the weapons used in Mahabharata. Here is a list of weapons used in Ramayana. Danda chakram (a circular weapon), Dharma chakram, Kaala chakram, Vishnu chakram, Indra astram, Vajra astram, Maha shoolam, Brahma shiro namaka astram,
Astra, the ones that carry weapons of Mass Destruction on the one hand and another devastating the enemy and his land with specific calamity Like Fire, Rain, Storms and psychological variety like Mohanastra which renders people unconscious, and Sammohanatsra which leaves one confused.
Weapons are of two kinds. One is called Sastra ,another Astra. While Sastras denote conventional weapons like Bow and Arrow,Mace(Gatha)`,Swords of different type..., Astra denote weapons that are energized by Mantras. Some of these Astras do not any supportive conventional weapon like Bow and Arrow. Mere uttering of the words will do. Another type is … Continue reading BrahmaSirōnāmāstra Counter To Brahmastra, The Nuclear Weapon
Narada told him, Krishna tells you, do it' Astra has to have a Target, Either it is your life or the Emerald in Your Head. (This emerald is precious and ensures success) Aswathama assigns the Emerald as the target.
Arjuna got this from Shiva and did not use it Mahabharata war. Karna was cursed by Parashurama to the effect that he would forget the Invoking Mantra because he lied to Parashurama that he (Karna) was a Brahmin. The Narayanastra was used by Aswathama in the Mahabharata war at Arjuna after his father Drona was killed. The Narayanastra is also unstoppable. Lord Krishna advised all those who were present to drop all their arms and prostrate before it. They did so and it and it state destroying the Universe, because Aswathama did not know how to recall it. Narada advised him to offer a target for it and Aswathama offered his Precious jewel on this head. For this irresponsible act, Aswathama was cursed by Narada to become Immortal and be wandering in the forest alone. What is the Mantra to invoke the Brahmastra?