Declension table of ?yakṣatva

Neuter	Singular	Dual	Plural
Nominative	yakṣatvam	yakṣatve	yakṣatvāni
Vocative	yakṣatva	yakṣatve	yakṣatvāni
Accusative	yakṣatvam	yakṣatve	yakṣatvāni
Instrumental	yakṣatvena	yakṣatvābhyām	yakṣatvaiḥ
Dative	yakṣatvāya	yakṣatvābhyām	yakṣatvebhyaḥ
Ablative	yakṣatvāt	yakṣatvābhyām	yakṣatvebhyaḥ
Genitive	yakṣatvasya	yakṣatvayoḥ	yakṣatvānām
Locative	yakṣatve	yakṣatvayoḥ	yakṣatveṣu

Compound yakṣatva -

Adverb -yakṣatvam -yakṣatvāt