so 'grasat tāni kṛtsnaśaḥ

tam-him; nijaghnuh-struck; abhidrutya-running to; sa-ganah-with soldiers; vibudha-rsabhah-all the great demigods; svaih svaih-with their own respective; divya-transcendental; astra-bows and arrows; sastra-oghaih-different weapons; sah-he (Vrtra); agrasat-swallowed; tani-them (the weapons); krtsnasah-all together.