Declension table of mantrasādhana

Neuter	Singular	Dual	Plural
Nominative	mantrasādhanam	mantrasādhane	mantrasādhanāni
Vocative	mantrasādhana	mantrasādhane	mantrasādhanāni
Accusative	mantrasādhanam	mantrasādhane	mantrasādhanāni
Instrumental	mantrasādhanena	mantrasādhanābhyām	mantrasādhanaiḥ
Dative	mantrasādhanāya	mantrasādhanābhyām	mantrasādhanebhyaḥ
Ablative	mantrasādhanāt	mantrasādhanābhyām	mantrasādhanebhyaḥ
Genitive	mantrasādhanasya	mantrasādhanayoḥ	mantrasādhanānām
Locative	mantrasādhane	mantrasādhanayoḥ	mantrasādhaneṣu

Compound mantrasādhana -

Adverb -mantrasādhanam -mantrasādhanāt