Matsya Purana — War of Devas and Asuras; Birth of Aurva Fire; Countering Tamasī Māyā through ...
तद्युद्धमभवद्घोरं देवदानवसंकुलम् जगतस्त्रासजननं युगसंवर्तकोपमम् //
tadyuddhamabhavadghoraṃ devadānavasaṃkulam jagatastrāsajananaṃ yugasaṃvartakopamam //
That battle became dreadful—crowded with Devas and Dānavas—striking terror into the worlds, and resembling the fury of the cosmic dissolution at the end of an age.
It uses the standard Purāṇic benchmark of “yuga-saṃvarta” (end-of-age dissolution) to convey the battle’s scale—its violence is said to resemble the wrathful upheaval associated with cosmic collapse.
Indirectly, it frames war as a force that can terrify and destabilize the world; in Purāṇic ethics this supports the idea that rulers should wage war only for dharma and protection of order, not for needless devastation.
None is stated explicitly; the verse is a poetic battle description, using pralaya-simile rather than giving Vāstu, temple, or ritual prescriptions.