[Qian]

Here's a little I found talking about a patch around 2002-02-14 on:

http://www.mobhunter.com/mobhunter_a...563729945.html

Previously, when the Statue of Rallos Zek was killed, the Avatar of War would spawn for around 45-60 minutes. If no one defeated him during that time, the AoW would despawn.