Declension table of amantra

Neuter	Singular	Dual	Plural
Nominative	amantram	amantre	amantrāṇi
Vocative	amantra	amantre	amantrāṇi
Accusative	amantram	amantre	amantrāṇi
Instrumental	amantreṇa	amantrābhyām	amantraiḥ
Dative	amantrāya	amantrābhyām	amantrebhyaḥ
Ablative	amantrāt	amantrābhyām	amantrebhyaḥ
Genitive	amantrasya	amantrayoḥ	amantrāṇām
Locative	amantre	amantrayoḥ	amantreṣu

Compound amantra -

Adverb -amantram -amantrāt