In order to put an end to the corruption of Koral the Defiler, you must first ascend the platforms beneath the Black Focus to reach the platform on which he resides. Drusera has said this is treacherous climb, and that you should be careful.
1. Start the ascent to the Black Focus
2. Ascend the platforms to reach the Black Focus
Speak with Drusera via your Datachron
Faction: Exile, Dominion
Required Level: 47
Zone: The Defile
Category: Zone – Grimvault