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 Tricentenario
So many words in the RAE dictionary that nobody uses anymore. But in this case, the form “creatura” is just weird. The conventional way is “criatura” for, basically, all Spanish speaking countries in XXI century.