Mbh 7.155.4a

“Sanjaya continued, ‘Having heard these words, Ghatotkacha, filled with grief on account of the fall of his son, and with eyes red as copper in wrath, approached Aswatthaman and said, “Am I a dastard in battle, O son of Drona, like a vulgar person, that thou dost frighten me thus with words? Thy words are improper. Verily, I have been begotten by Bhima in the celebrated race of the Kurus. I am a son of the Pandavas, those heroes that never retreat from battle. I am the king of the Rakshasas, equal to the Ten-necked (Ravana) in might. Wait, wait, O son of Drona! Thou shalt not escape me with life. I shall today, on the field of battle, dispel thy desire for fight.” Having thus replied unto Aswatthaman, that mighty Rakshasa with eyes red as copper in rage, rushed furiously against the son of Drona, like a lion against a prince of elephants. And Ghatotkacha began to shower upon that bull among car-warriors, viz., Drona’s son, shafts of the measure of Aksha of battle car, like a cloud pouring torrents of rain. Drona’s son however, with his own shafts, checked that arrowy shower before it could reach him. At that time, it seemed that another encounter was taking place in the welkin between shafts (as the combatants). The welkin, then, during the night, shone resplendent with the sparks caused by the clash of those weapons, as if with (myriads of) flies. Observing that his illusion was dispelled by Drona’s son, proud of his prowess in battle, Ghatotkacha, once more making himself invisible, created an illusion. He assumed the form of a high mountain, crowded with cliffs and trees, and possessing fountains from which ceaselessly flowed spears and lances and swords and heavy clubs. Beholding that mountain-like mass of antimony, with countless weapons falling from it, Drona’s son was not at all moved. The latter invoked into existence the Vajra weapon.[200] The prince of mountains, then, struck with that weapon, was quickly destroyed.