 Complete the following phrase:  Güyük invaded Transylvania in three columns through the Tihuţa and Oituz Passes and the Timiş-Cerna Gap, while Subutai attacked through the fortified Verecke Pass towards central Hungary. Güyük sacked Sibiu, Cisnadie, Alba Iulia, Bistriţa, Cluj-Napoca, Oradea as well as the Hungarian kings silver mine at Rodna. This prevented the Transylvanian nobility from aiding King Béla IV in the crucial 