Declension table of ?svargastha

Neuter	Singular	Dual	Plural
Nominative	svargastham	svargasthe	svargasthāni
Vocative	svargastha	svargasthe	svargasthāni
Accusative	svargastham	svargasthe	svargasthāni
Instrumental	svargasthena	svargasthābhyām	svargasthaiḥ
Dative	svargasthāya	svargasthābhyām	svargasthebhyaḥ
Ablative	svargasthāt	svargasthābhyām	svargasthebhyaḥ
Genitive	svargasthasya	svargasthayoḥ	svargasthānām
Locative	svargasthe	svargasthayoḥ	svargastheṣu

Compound svargastha -

Adverb -svargastham -svargasthāt