Declension table of ?viṣatantra

Neuter	Singular	Dual	Plural
Nominative	viṣatantram	viṣatantre	viṣatantrāṇi
Vocative	viṣatantra	viṣatantre	viṣatantrāṇi
Accusative	viṣatantram	viṣatantre	viṣatantrāṇi
Instrumental	viṣatantreṇa	viṣatantrābhyām	viṣatantraiḥ
Dative	viṣatantrāya	viṣatantrābhyām	viṣatantrebhyaḥ
Ablative	viṣatantrāt	viṣatantrābhyām	viṣatantrebhyaḥ
Genitive	viṣatantrasya	viṣatantrayoḥ	viṣatantrāṇām
Locative	viṣatantre	viṣatantrayoḥ	viṣatantreṣu

Compound viṣatantra -

Adverb -viṣatantram -viṣatantrāt