Declension table of ?mahāphaṇaka

Masculine	Singular	Dual	Plural
Nominative	mahāphaṇakaḥ	mahāphaṇakau	mahāphaṇakāḥ
Vocative	mahāphaṇaka	mahāphaṇakau	mahāphaṇakāḥ
Accusative	mahāphaṇakam	mahāphaṇakau	mahāphaṇakān
Instrumental	mahāphaṇakena	mahāphaṇakābhyām	mahāphaṇakaiḥ mahāphaṇakebhiḥ
Dative	mahāphaṇakāya	mahāphaṇakābhyām	mahāphaṇakebhyaḥ
Ablative	mahāphaṇakāt	mahāphaṇakābhyām	mahāphaṇakebhyaḥ
Genitive	mahāphaṇakasya	mahāphaṇakayoḥ	mahāphaṇakānām
Locative	mahāphaṇake	mahāphaṇakayoḥ	mahāphaṇakeṣu

Compound mahāphaṇaka -

Adverb -mahāphaṇakam -mahāphaṇakāt