Yes, that's the one, and he dropped it right away when Zandalor killed him. Actually, since I was playing a warrior and a gold strength charm was dropped (the only charm I used in the game), I thought he might always drop something, which could depend on your class. I saved the game, then reloaded a slightly earlier one to see if I got the same thing again, but he didn't drop anything. I think a third try resulted in some gold or a potion, so I reloaded the save with the gold charm.