It’s “criatura” If you are trying to write it in Spanish
La Real academia española
lists “creatura” as a synonym of criatura

creatura | Diccionario de la lengua española
Definición RAE de «creatura» según el Diccionario de la lengua española: 1. f. cult. criatura.
«Diccionario de la lengua española» - Edición del TricentenarioIt’s not synonym, cult means that the “correct” way to write it is “criatura”. Is in the index because the RAE acknowledge that “creatuta” exists as a word.
cult. just means “creatura” is closer to Latin creatūra. Also, as far as I know, the RAE doesn’t list any misspellings. I’d take them acknowledging it exists as a word to be enough for it to count as “proper” Spanish.