Matsya Purana — The Battle at Tripura: Shiva’s Strategy
भूयः संपतते चाग्निर् ग्रहान्ग्राहान्भुजंगमान् गिरीन्द्रांश्च हरीन्व्याघ्रान् वृक्षान् सृमरवर्णकान् //
bhūyaḥ saṃpatate cāgnir grahāngrāhānbhujaṃgamān girīndrāṃśca harīnvyāghrān vṛkṣān sṛmaravarṇakān //
Again the blazing fire rushes down, consuming the graspers (grāhas) and crocodiles, serpents, the lordly mountains, deer and tigers, and even trees—beings of many kinds and colors.
It depicts pralaya as an all-consuming descent of fire that overwhelms every level of existence—animals, fearsome beings, vegetation, and even mountains—signaling total dissolution rather than localized disaster.
By stressing the inevitability of destruction, it supports the Purāṇic ethic of detachment and righteous governance: a king/householder should uphold dharma and perform prescribed duties without pride in impermanent power, wealth, or possessions.
No direct Vāstu or temple-building rule is stated; the takeaway is ritual-philosophical—pralaya imagery reinforces the need for protective rites, merit (puṇya), and dharmic living rather than reliance on physical structures that are ultimately perishable.