[Erydian]

Actually he *does* drop some items. If you didn't get them you might want to consider battling him again. I remember when I killed him initially (I did not use any spells that should have destroyed the items he was carrying), he did not drop any items, and I had to reload and kill him again. The second time around, I got my dues.

Spoiler
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The items that he drops are as follows:
-Portal Key
-Circlet of Netheril (Cespenar can upgrade)
-Ixil's Spike (Cespenar can upgrade)

If you don't want to fight him again, and aren't opposed to using the cheat system, you could always summon these items.