Declension table of ?kṛtyāstra

Neuter	Singular	Dual	Plural
Nominative	kṛtyāstram	kṛtyāstre	kṛtyāstrāṇi
Vocative	kṛtyāstra	kṛtyāstre	kṛtyāstrāṇi
Accusative	kṛtyāstram	kṛtyāstre	kṛtyāstrāṇi
Instrumental	kṛtyāstreṇa	kṛtyāstrābhyām	kṛtyāstraiḥ
Dative	kṛtyāstrāya	kṛtyāstrābhyām	kṛtyāstrebhyaḥ
Ablative	kṛtyāstrāt	kṛtyāstrābhyām	kṛtyāstrebhyaḥ
Genitive	kṛtyāstrasya	kṛtyāstrayoḥ	kṛtyāstrāṇām
Locative	kṛtyāstre	kṛtyāstrayoḥ	kṛtyāstreṣu

Compound kṛtyāstra -

Adverb -kṛtyāstram -kṛtyāstrāt