Declension table of tantraratna

Neuter	Singular	Dual	Plural
Nominative	tantraratnam	tantraratne	tantraratnāni
Vocative	tantraratna	tantraratne	tantraratnāni
Accusative	tantraratnam	tantraratne	tantraratnāni
Instrumental	tantraratnena	tantraratnābhyām	tantraratnaiḥ
Dative	tantraratnāya	tantraratnābhyām	tantraratnebhyaḥ
Ablative	tantraratnāt	tantraratnābhyām	tantraratnebhyaḥ
Genitive	tantraratnasya	tantraratnayoḥ	tantraratnānām
Locative	tantraratne	tantraratnayoḥ	tantraratneṣu

Compound tantraratna -

Adverb -tantraratnam -tantraratnāt