Very large aggro radius, use caution when pulling mobs around Tower zone in, because he will aggro out of sight and come running to you!
I should add that I believe he's tied to the bazus, pull him only and not any bazu while he's up or he will assist.
2nd edit to say that he will aggro any mob in the immediate area, but if you pull only him mobs do not assist to his degree of a aggro radius.
Edited, Oct 7th 2010 11:13am by OibtheMighty