Matsya Purana — War of Devas and Asuras; Birth of Aurva Fire; Countering Tamasī Māyā through ...
स दैत्यप्रमुखान्हत्वा तद्दानवबलं महत् तामसेनास्त्रजालेन तमोभूतमथाकरोत् //
sa daityapramukhānhatvā taddānavabalaṃ mahat tāmasenāstrajālena tamobhūtamathākarot //
Having slain the foremost leaders of the Daityas, he then rendered that vast host of the Dānavas powerless—enveloping it in darkness by means of a net of tāmasa weapons.
Directly, it does not describe cosmic Pralaya; it uses “tamas” (darkness) as a battle-effect—an obscuring, disabling force produced by tāmasa astras, echoing the Purāṇic motif that darkness can function as a weapon rather than a cosmic dissolution.
By implication, it models a dharmic strategy of neutralizing aggression: first removing the leaders who drive adharma, then disabling the remaining hostile force with minimal further slaughter—an ideal often extended in Purāṇic ethics to righteous governance and protection.
No Vāstu or temple-ritual rule is stated in this verse; its technical focus is on astravidyā (weapon-lore), specifically the ‘tāmasa’ class of missiles that overwhelm opponents through darkness and disorientation.