But you did know you don't have to kill him right? Lol.
It was pure accident for me that i found it out...
i was extremely low on Kash, and i didn't know where to go to read the legend so i spoke to the administrator dude and he sounded the alarm
but i killed the gaurd then got the 25 Kashes...Then he sounds it AGAIN!, and i had about 2 hits of health so i reset and found i still had my Kash!
Plus it's kinda worthless killing the gaurd...it takes a little while and it's only 3.
Just a thing i found out, although you might have too...