Declension table of ?rudratva

Neuter	Singular	Dual	Plural
Nominative	rudratvam	rudratve	rudratvāni
Vocative	rudratva	rudratve	rudratvāni
Accusative	rudratvam	rudratve	rudratvāni
Instrumental	rudratvena	rudratvābhyām	rudratvaiḥ
Dative	rudratvāya	rudratvābhyām	rudratvebhyaḥ
Ablative	rudratvāt	rudratvābhyām	rudratvebhyaḥ
Genitive	rudratvasya	rudratvayoḥ	rudratvānām
Locative	rudratve	rudratvayoḥ	rudratveṣu

Compound rudratva -

Adverb -rudratvam -rudratvāt