Declension table of ?tantratva

Neuter	Singular	Dual	Plural
Nominative	tantratvam	tantratve	tantratvāni
Vocative	tantratva	tantratve	tantratvāni
Accusative	tantratvam	tantratve	tantratvāni
Instrumental	tantratvena	tantratvābhyām	tantratvaiḥ
Dative	tantratvāya	tantratvābhyām	tantratvebhyaḥ
Ablative	tantratvāt	tantratvābhyām	tantratvebhyaḥ
Genitive	tantratvasya	tantratvayoḥ	tantratvānām
Locative	tantratve	tantratvayoḥ	tantratveṣu

Compound tantratva -

Adverb -tantratvam -tantratvāt