Skorn

The Necropolis
If you try to talk to him while at level 2 or lower, he will reply:
 * Skorn: Skorn glares down at you. Begone, insect. You have no business here.

If you are at level 3 or higher, however, he will reply:
 * Skorn: The massive warforged watches you without emotion. Do you have the courage to face the Burning Heart? The vampire's servant is down there in the tomb, laughing at our best efforts to destroy it.
 * You: I'm not afraid. Send me down there and I'll take care of things.
 * Skorn: Is that so? And all by yourself, I suppose? I admire your pluck but there is no way you can face Bekenkhonsu alone. A proper adventuring party of four should be sufficient, though an extra sword arm is always welcome in a fight.
 * You: don't worry about me. I have plenty of allies that would accompany me on such a quest! We'll be back before supper. (Bestow quest)
 * You: Your problems don't concern me. (Walk away)

Talking to him after acquiring the quest, but before completion, will make him say:
 * Skorn: I knew you lacked the spine for this kind of work. Get away from me and don't come back until the mission is done.

On completion of quest, he will congratulate you with the following:
 * Skorn: The mummy prince is dead then? Excellent...and done quickly, I might add. Maybe I should pettition for you as an apprentice.
 * You: No thanks. I prefer to remain a free agent.
 * Skorn: I see nothing wrong with that. The responsibility is too much for some to bear. Still, your efforts are appreciated.
 * You: And I'll continue to assist for as long as the Abbot remains a threat.

After completing the quest and taking the reward, if you talk to him again, he will reply:
 * Skorn: Skorn glares down at you. Begone, insect. You have no business here.