In the Hungarian language

Hungarian language

Hungarian is a Uralic language, part of the Ugric group. With some 14 million speakers, it is one of the most widely spoken non-Indo-European languages in Europe....

 this case combines the Essive case

Essive case

The essive or similaris case carries the meaning of a temporary location or state of being, often equivalent to the English "as a ".In the Finnish language, this case is marked by adding "-na/-nä" to the stem of the noun....

 and the Formal case, and it can express the position, task, state (e.g. "as a tourist"), or the manner (e.g. "like a hunted animal"). The
status of the suffix -ként in the declension system is disputed for several reasons. First, in general, Hungarian case suffixes are absolute word-final, while -ként permits further suffixation by the locative
suffix -i. Second, most Hungarian case endings participate in vowel harmony

Vowel harmony

Vowel harmony is a type of long-distance assimilatory phonological process involving vowels that occurs in some languages. In languages with vowel harmony, there are constraints on which vowels may be found near each other....

, while -ként does not.
For these reasons, many modern analyses of the Hungarian case system, starting with László Antal

László Antal

László Antal was a Hungarian linguist, structuralist, Doctor of Science , and Professor of Linguistics. He was considered the sole representative of structural linguistics in America in Hungary. He adapted American structuralism to the Hungarian language...

's
"A magyar esetrendszer" (1961) do not consider the essive-formal to be a case.