Declension table of ?saptarca

Neuter	Singular	Dual	Plural
Nominative	saptarcam	saptarce	saptarcāni
Vocative	saptarca	saptarce	saptarcāni
Accusative	saptarcam	saptarce	saptarcāni
Instrumental	saptarcena	saptarcābhyām	saptarcaiḥ
Dative	saptarcāya	saptarcābhyām	saptarcebhyaḥ
Ablative	saptarcāt	saptarcābhyām	saptarcebhyaḥ
Genitive	saptarcasya	saptarcayoḥ	saptarcānām
Locative	saptarce	saptarcayoḥ	saptarceṣu

Compound saptarca -

Adverb -saptarcam -saptarcāt