The Winglord Caromi in the Black Curtain is one of six bosses that the Krytan Herald at the Temple of the Ages warns about. They are all much higher in level than the rest of the creatures in the area.
The Black Curtain: The Winglord Caromi's location is fixed. He will always be in the southwestern corner of the Black Curtain, in a small U shaped branch off the main swampy area. He does not always spawn, however.