Learn Croatian: Tražim takvog izvođača kakav ima jedinstven talent. - I am looking for the kind of performer who has a unique talent.

In takav ... kakav correlative clauses, each word takes the case required by its own half of the sentence. Takvog izvođača is the direct object of the verb tražim (I am looking for), so it takes the accusative. However, kakav is the subject of the second clause (kakav ima - who has), so it must be in the nominative.

Why use kakav here instead of koji, since the English translation says 'who'?

If you used koji, you would simply be identifying a performer. By using the takav ... kakav pair, you emphasize the quality or type of person. It translates more closely to 'such a performer, the likes of whom...' or 'the kind of performer who...'

Both izvođač and talent are masculine nouns acting as direct objects here. Why does only izvođača get an ending?

This highlights the animate vs. inanimate rule for masculine nouns in the accusative case. Because an izvođač (performer) is a living being, it takes the animate accusative ending -a (matching the genitive). Talent is an inanimate concept, so its accusative form stays identical to its nominative form.

Why is the adjective jedinstven used instead of jedinstveni?