Matsya Purana — War of Devas and Asuras; Birth of Aurva Fire; Countering Tamasī Māyā through ...
अपध्वस्ता विसंज्ञाश्च तमसा नीलवर्चसा पेतुस्ते दानवगणाश् छिन्नपक्षा इवाद्रयः //
apadhvastā visaṃjñāśca tamasā nīlavarcasā petuste dānavagaṇāś chinnapakṣā ivādrayaḥ //
Struck down and senseless, shrouded by a dark, blue-tinged gloom, those hosts of Dānavas fell—like mountains whose wings have been cut off.
It does not directly describe Pralaya; it uses the language of darkness (tamas) as a battlefield motif—suggesting overpowering obscuration and collapse rather than cosmic dissolution.
Indirectly, it reinforces the Purāṇic ethic that adharma-driven forces ultimately fall; for kings, it supports the ideal explained elsewhere in the Matsya Purana that governance must align with dharma to avoid ruin.
No Vāstu or ritual procedure is taught here; the ‘wingless mountains’ simile is mythic imagery (often tied to the old motif of mountains once having wings) rather than a temple-architecture rule.