Matsya Purana — War of Devas and Dānavas: Yama and Kubera Defeated; Kālanemi’s Māyā and the A...
ततः स मेघरूपी तु कालनेमिर्महासुरः शस्त्रवृष्टिं ववर्षोग्रां देवानीकेषु दुर्जयाम् //
tataḥ sa megharūpī tu kālanemirmahāsuraḥ śastravṛṣṭiṃ vavarṣogrāṃ devānīkeṣu durjayām //
Then Kālanemi, that mighty Asura, assuming the form of a cloud, rained down a fierce shower of weapons upon the hosts of the gods—an onslaught hard to withstand.
This verse does not address pralaya or cosmological dissolution; it focuses on a battlefield image where Kālanemi uses a cloud-like form to unleash a weapon-storm against the Devas.
Indirectly, it reflects the Purāṇic ideal of kṣātra-dharma (martial duty): leaders must remain steadfast under overwhelming assaults, just as the Deva-host must endure and respond to a seemingly unstoppable attack.
No Vāstu, temple-building, or ritual procedure is stated here; the technical focus is poetic warfare vocabulary (megharūpī, śastravṛṣṭi) used to depict supernatural combat.