Declension table of ?pralayatva

Neuter	Singular	Dual	Plural
Nominative	pralayatvam	pralayatve	pralayatvāni
Vocative	pralayatva	pralayatve	pralayatvāni
Accusative	pralayatvam	pralayatve	pralayatvāni
Instrumental	pralayatvena	pralayatvābhyām	pralayatvaiḥ
Dative	pralayatvāya	pralayatvābhyām	pralayatvebhyaḥ
Ablative	pralayatvāt	pralayatvābhyām	pralayatvebhyaḥ
Genitive	pralayatvasya	pralayatvayoḥ	pralayatvānām
Locative	pralayatve	pralayatvayoḥ	pralayatveṣu

Compound pralayatva -

Adverb -pralayatvam -pralayatvāt