Declension table of ?mantrasādhya

Neuter	Singular	Dual	Plural
Nominative	mantrasādhyam	mantrasādhye	mantrasādhyāni
Vocative	mantrasādhya	mantrasādhye	mantrasādhyāni
Accusative	mantrasādhyam	mantrasādhye	mantrasādhyāni
Instrumental	mantrasādhyena	mantrasādhyābhyām	mantrasādhyaiḥ
Dative	mantrasādhyāya	mantrasādhyābhyām	mantrasādhyebhyaḥ
Ablative	mantrasādhyāt	mantrasādhyābhyām	mantrasādhyebhyaḥ
Genitive	mantrasādhyasya	mantrasādhyayoḥ	mantrasādhyānām
Locative	mantrasādhye	mantrasādhyayoḥ	mantrasādhyeṣu

Compound mantrasādhya -

Adverb -mantrasādhyam -mantrasādhyāt