Declension table of mantrya

Neuter	Singular	Dual	Plural
Nominative	mantryam	mantrye	mantryāṇi
Vocative	mantrya	mantrye	mantryāṇi
Accusative	mantryam	mantrye	mantryāṇi
Instrumental	mantryeṇa	mantryābhyām	mantryaiḥ
Dative	mantryāya	mantryābhyām	mantryebhyaḥ
Ablative	mantryāt	mantryābhyām	mantryebhyaḥ
Genitive	mantryasya	mantryayoḥ	mantryāṇām
Locative	mantrye	mantryayoḥ	mantryeṣu

Compound mantrya -

Adverb -mantryam -mantryāt