[Bishop]

I am in the excavated ruins and have discoverd a shield guarian guarding the remains of his master. The master has great magic items that I want to loot, but the guardian will kill me if I touch it. I am a level 9 wizard, and have all the great magic items the game offers up to this point, but the stupid guardian is imune to magic, so I'm screwed. I read in some walkthroughs that you can talk the guardian into letting you "retrieve" his masters belongings, but I have tried every which way of talking to this guy to no avail. Can somebody please help me with this?

I tried meleeing the thing with a henchmen but he regenerates faster than we can damage him. Please help.

-Bishop