Declension table of ?vṛtratva

Neuter	Singular	Dual	Plural
Nominative	vṛtratvam	vṛtratve	vṛtratvāni
Vocative	vṛtratva	vṛtratve	vṛtratvāni
Accusative	vṛtratvam	vṛtratve	vṛtratvāni
Instrumental	vṛtratvena	vṛtratvābhyām	vṛtratvaiḥ
Dative	vṛtratvāya	vṛtratvābhyām	vṛtratvebhyaḥ
Ablative	vṛtratvāt	vṛtratvābhyām	vṛtratvebhyaḥ
Genitive	vṛtratvasya	vṛtratvayoḥ	vṛtratvānām
Locative	vṛtratve	vṛtratvayoḥ	vṛtratveṣu

Compound vṛtratva -

Adverb -vṛtratvam -vṛtratvāt