Declension table of ?svapnya

Neuter	Singular	Dual	Plural
Nominative	svapnyam	svapnye	svapnyāni
Vocative	svapnya	svapnye	svapnyāni
Accusative	svapnyam	svapnye	svapnyāni
Instrumental	svapnyena	svapnyābhyām	svapnyaiḥ
Dative	svapnyāya	svapnyābhyām	svapnyebhyaḥ
Ablative	svapnyāt	svapnyābhyām	svapnyebhyaḥ
Genitive	svapnyasya	svapnyayoḥ	svapnyānām
Locative	svapnye	svapnyayoḥ	svapnyeṣu

Compound svapnya -

Adverb -svapnyam -svapnyāt