Keiji Sozoji tells you, "I have a task suitable for one who has visited the Dark Isle. Listen, and I shall instruct you."
Keiji Sozoji tells you, "There is, upon the Dark Isle, an undead Ruschk named Vaeshok. He has thrown off the mantle of his former master, and now seeks to serve a new master - the dark power behind the Blight."
Keiji Sozoji tells you, "Go and defeat him, then return to me. I shall know if you have succeeded."