Sir Eric Rodemai:
Let me see if I can put them together...
It is at the National Cemetery...
Once you defeat the grave keeper a key master will show up and give you a key...
When you collect all six keys, you must overpower the imperial grave keeper and find the scepter...
You must take care, as the Imperial grave keeper can move through time and space... This will appear as instantaneous attacks... You must divide your team into two parts to defeat him.