Declension table of ?mantraratna

Neuter	Singular	Dual	Plural
Nominative	mantraratnam	mantraratne	mantraratnāni
Vocative	mantraratna	mantraratne	mantraratnāni
Accusative	mantraratnam	mantraratne	mantraratnāni
Instrumental	mantraratnena	mantraratnābhyām	mantraratnaiḥ
Dative	mantraratnāya	mantraratnābhyām	mantraratnebhyaḥ
Ablative	mantraratnāt	mantraratnābhyām	mantraratnebhyaḥ
Genitive	mantraratnasya	mantraratnayoḥ	mantraratnānām
Locative	mantraratne	mantraratnayoḥ	mantraratneṣu

Compound mantraratna -

Adverb -mantraratnam -mantraratnāt