Declension table of arcana

Neuter	Singular	Dual	Plural
Nominative	arcanam	arcane	arcanāni
Vocative	arcana	arcane	arcanāni
Accusative	arcanam	arcane	arcanāni
Instrumental	arcanena	arcanābhyām	arcanaiḥ
Dative	arcanāya	arcanābhyām	arcanebhyaḥ
Ablative	arcanāt	arcanābhyām	arcanebhyaḥ
Genitive	arcanasya	arcanayoḥ	arcanānām
Locative	arcane	arcanayoḥ	arcaneṣu

Compound arcana -

Adverb -arcanam -arcanāt