Use of Aindrastra in Ramayana:
1. Rishi Vishwamitra used Aindrastra on Rishi Vashishtha.
In rage, Gadhi’s descendant hurled varuna, roudra, aindra, pashupata and aishika weapons and manava, mohana ,gandharva , svapana , jrimbhana (yawner), mohana (intoxicator) ,santapana (humidifier), and vilapana. There were shoshana and darana and the vajra weapon, which is extremely difficult to withstand.
Source: valmiki Ramayana Bala Kanda Sarga 56
2. Lakshmanji had slain Meghnat using Aindrastra.
Lakshmana drew the bow all the way back up to his ear and released the arrow towards Indrajit. Lakshmana, the slayer of enemy heroes, invoked aindrastra. The handsome head of Indrajit was severed from the body and fell down on the ground. Slain, Ravana’s son swiftly fell down on the ground.
Source: valmiki Ramayana Yuddha Kanda Sarga 90
3. Lakshmanji baffled Tvashtra Aishika missile using Aindrastra.
Their rays were reduced to ashes and those two excellent arrows were no longer radiant. Angry, Atikaya released the aishika weapon presided over by Tvashta (the architect of gods). The valiant Soumitri severed this with aindrastra.
Source: valmiki Ramayana Yuddha Kanda Sarga 71
4. Supreme Lord Rama had slain Khara using Aindrastra.
That particular arrow is made available to Rama through Sage Agastya by the king of gods, namely Indra, because Indra is a sensible one about the future course of events, and he is also prosperous in securing impossible weaponry, and now Rama fitted such an arrow on his bow and released it towards Khara.
Source: valmiki Ramayana Aranya Kanda Sarga 30
5. Lord Rama used this same Aindrastra on loser Ravan also.
Having used many arrows, Raghava started to think. ‘All these arrows have killed Maricha, Khara, Dushana, Viradha in the Krouncha forest and Kabandha in the Dandaka forest. These arrows by which seven Sala trees and the mountains were burst, by which Vali was killed and the ocean shaken up.
Source: valmiki Ramayana Yuddha Kanda sarga 107
6. Bhagwan Shri Rama uprooted arm of fatty Kumbhkaran using Aindrastra.
By his arrow, which was made variegated by gold and furnished with a mystic spell of Indra used for charming it, Rama chopped off Kumbhakarna's remaining arm, appearing like the coil of a serpent along with his uprooted palm-tree.
Source: valmiki Ramayana Yuddha Kanda Sarga 67
7. Supreme Lord Rama slashed Kumbhkaran's head using Aindrastra.
Thereupon, that Rama got hold of an arrow spelled with a missile presided over by Indra the lord of celestials, effulgent as sun's rays, resembling the rod of Brahma the lord of creation as also the destructive Kala, the Time-Spirit, and having its speed equal to the wind.That Rama slashed Kumbhakarna's head.
Source: valmiki Ramayana Yuddha Kanda Sarga 67
Use of Aindrastra in Mahabharata:
1. Dronacharya fires Aindrastra on Arjuna in Virata war but Arjuna countered it using the same.
And the son of Pandu repeatedly baffled with his own, the Aindra, the Vayavya, and the Agneya weapons that were shot by Drona. And discharging keen shafts, those mighty bowmen, by their arrowy showers completely covered the sky and made a wide expanse of shade.
Source: Drona Parva: Goharana-Parva: Section LVIII
2. Bhishma Pitamah also fires Aindrastra on Arjuna in Virata war but Arjuna countered it using the same.
And those illustrious warriors ranged on the field of battle, using the celestials weapons obtained from Prajapati and Indra, and Agni and the fierce Rudra, and Kuvera, and Varuna, and Yama, and Vayu. And all beings were greatly surprised, upon beholding those warriors engaged in combat.
Source: Virata Parva: Go-harana Parva: Section LXIII
3. Ashvatthama fired Aindrastra on Arjuna.
Thus cut off with Partha’s shafts, it fell down on the Earth, like a mountain, O king, broken into pieces, struck with the thunderbolt. Filled with rage at this, Drona’s son, that great car-warrior, began to cover Vibhatsu, aided by the energy of the aindra weapon.
Source: Karna Parva: Section 64
4. Arjuna used another Aindrastra to counter it.
Partha, endued with great activity, O king, taking up his bow gandiva, and fixing on his bowstring a mighty weapon created by Indra, destroyed that aindra-shower of arrows. Having baffled that arrowy shower caused by the aindra weapon Partha soon covered the car of Drona’s son.
Source: Karna Parva: Section 64
5. Arjuna fired Aindrastra on Samshaptakas.
The mighty car-warrior Jishnu, of immeasurable soul, endued with prowess resembling that of Sakra himself, invoked the Aindra weapon. From that weapon, thousands of shafts, O king, began to issue continually. Then O king, a loud din was heard of falling cars.
Source: Karna Parva: Section 27
6. Dronacharya fired Aindrastra on Yudhishthira Maharaja.
All those weapons of the Pot-born that were hurled or in course of being hurled at him. Then the Pot-born, striving to accomplish his vow and desirous also for your son’s good, to slay the son of Dharma, invoked into existence, O Bharata, the Sundar and the Prajapatya weapons.
Source: Ghatotkacha-vadha Parva: Section CLVI
7. Arjuna used Aindrastra to slay thousands of kings who surrounded him in Kurukshetra on the 3rd day.
Then Arjuna, O king, excited with wrath, invoked the Aindra weapon. And then the prowess we beheld of Vijaya seemed to be highly wonderful insomuch that those showers of weapons shot by his foes were checked by his myriads of arrows. And there among those thousands of kings and steeds and elephants, was none, O king, that was not wounded.
Source: Bhishma Parva: Bhagavat-Gita Parva: Section LXXXII
8. Dronacharya fired Aindrastra on Arjuna but later destroyed it quickly.
When Drona failed to gain any ascendency over the son of Pandu, the son of Bharadvaja, that warrior acquainted with the course of all weapons, invoked into existence the Aindra, the Pasupata, the Tvashtra, the Vayavya, and the Yamya weapons. As soon as those weapons, issued from Drona’s bow, Dhananjaya destroyed them quickly.
Source: Drona Parva: Drona-vadha Parva: Section CLXXXVIII
9. Satyaki fired Aindrastra to counter illusions of Alambusha.
On the other hand, O Bharata, that son of Vrishni’s race applied (with Mantras) the Aindra weapon, which that illustrious hero of Madhu’s race had obtained from Vijaya. That weapon, consuming into ashes that Demoniac illusion, covered Alamvusha all over with terrible shafts, like a mass of clouds covering the mountain-breast with torrents of rain in the rainy season.
Source: Bhishma Parva: Bhagavat-Gita Parva: Section LXXXIII
10. Bhishma Pitamah fired Aindrastra during his fight with Salva.
Then that first of men, Bhishma, the son of Santanu, fighting for the sake of those damsels, slew with the Aindra weapon the noble steeds of his adversary. He then vanquished that best of monarchs but left him with his life. O bull of Bharata’s race, Salya, after his defeat, returned to his kingdom and continued to rule it virtuously.
Source: Adi Parva: Sambhava Parva: Section CII
11. Arjuna fired Aindrastra and frightened hundreds of Bharatas and also killed them using it.
Then the mighty-armed one, O king, excited with wrath, invoked into existence the invincible Aindra weapon, frightening all the Bharatas. Hundreds and thousands of blazing shafts of fiery mouths, inspired by mantras with the force of celestial weapons, flowed from it. With those shafts resembling fire or the rays of the sun, coursing with fierce impetuosity.
Source: Drona Parva: Jayadratha-vadha Parva: Section CXLV
12. Arjuna used Aindrastra to destroy the shower of divine weapons released by Dronacharya, Kripacharya, Ashwatthama, Karna, Vivimshati simultaneously.
They stationed themselves nearby and with great determination in that field of battle, swiftly showered him with many arrows that possessed feathered shafts. Having been thus covered from every direction with divine weapons, not even a space of two fingers could be seen on him. But maharatha Bibhatsu laughed and fixed his divine Aindra weapon on Gandiva. It was as radiant as the sun.
Source: Virata Parva: Go-harana Parva: Section 654(58).
13. Arjuna baffled Karna's Brahmastra using Aindrastra.
Beholding the brahmastra, Arjuna invoked the Aindra weapon with proper mantras. Inspiring gandiva, its string, and his shafts also, with mantras, that scorcher of foes poured showers like Purandara pouring rain in torrents. Those arrows endued with great energy and power, issuing out of Partha’s car, were seen to be displayed in the vicinity of Karna’s vehicle.
Source: Karna Parva: Section 90
14. Arjuna killed Achyutayu and Shrutaya using Aindrastra
‘“O descendant of the Bharata lineage! Bibhatsu slowly regained his senses, like one who has returned from the capital of the king of the dead. He saw that his chariot and Keshava were covered with a net of arrows and he also saw the two enemies stationed before him, like flaming this, maharatha Partha invoked the Shakra weapon. From this, thousands of arrows with drooping tufts were released.
Source: Drona Parva, Jayadhratha-vadha Parva, Chapter 1045(68)