Xaeon Penthrax

The Necropolis
If you try to talk to him while at level 4 or lower, he will reply:
 * Xaeon Penthrax: I cannot speak to you at the moment. Return later after preparations are complete.

If you are at level 5 or higher, however, he will reply:
 * Xaeon Penthrax: Welcome, friend. Are you prepared to enter the Tomb of the Shadow Lord?
 * You: Yes. Do you have any information about it?
 * Xaeon Penthrax: The way to Nebtawi is rife with hazards. Do not travel alone, and beware the mummy lord's attempts to separate you from your group.
 * You: I'll make sure to bring some companions. (Bestow quest)
 * You: I must go now. (Walk away)

Talking to him after acquiring the quest, but before completion, will make him say:
 * Xaeon Penthrax: You must destroy Nebtawi!

On completion of quest, he will congratulate you with the following:
 * Xaeon Penthrax: You return at last. We were afraid that you would fall prey to Nebtawi and his minions.
 * You: It wasn't easy but yes, the mummy is no more.

After completing the quest and taking the reward, if you talk to him again, he will reply:
 * Xaeon Penthrax: Huzzah! Oh, I can't believe I said that but I'm so excited. All this merriment and celebration is going to my head.