Declension table of mantraśāstra

Neuter	Singular	Dual	Plural
Nominative	mantraśāstram	mantraśāstre	mantraśāstrāṇi
Vocative	mantraśāstra	mantraśāstre	mantraśāstrāṇi
Accusative	mantraśāstram	mantraśāstre	mantraśāstrāṇi
Instrumental	mantraśāstreṇa	mantraśāstrābhyām	mantraśāstraiḥ
Dative	mantraśāstrāya	mantraśāstrābhyām	mantraśāstrebhyaḥ
Ablative	mantraśāstrāt	mantraśāstrābhyām	mantraśāstrebhyaḥ
Genitive	mantraśāstrasya	mantraśāstrayoḥ	mantraśāstrāṇām
Locative	mantraśāstre	mantraśāstrayoḥ	mantraśāstreṣu

Compound mantraśāstra -

Adverb -mantraśāstram -mantraśāstrāt