Declension table of mantrasiddha

Neuter	Singular	Dual	Plural
Nominative	mantrasiddham	mantrasiddhe	mantrasiddhāni
Vocative	mantrasiddha	mantrasiddhe	mantrasiddhāni
Accusative	mantrasiddham	mantrasiddhe	mantrasiddhāni
Instrumental	mantrasiddhena	mantrasiddhābhyām	mantrasiddhaiḥ
Dative	mantrasiddhāya	mantrasiddhābhyām	mantrasiddhebhyaḥ
Ablative	mantrasiddhāt	mantrasiddhābhyām	mantrasiddhebhyaḥ
Genitive	mantrasiddhasya	mantrasiddhayoḥ	mantrasiddhānām
Locative	mantrasiddhe	mantrasiddhayoḥ	mantrasiddheṣu

Compound mantrasiddha -

Adverb -mantrasiddham -mantrasiddhāt