((His first case is against the Gem Dragons, but I don't know what other cases he'll have afterwards because he'll primarily worship you. I just made sure to set up his first case as one that benefits me.
))
So, um, about this little case. Could I point out the small fact that, as far as I know, the Gem Dragons don't have any overriding authority telling them what to do? They're all individuals, with like mated pairs/families being the largest clumps.
So any attempt to get repayment from them is going to involve trekking out to lots and lots of individual lairs and then trying to get said individual dragons of greed to take you seriously, admit that they stole anything from you, admit that they didn't do what was on their half of the deal when no details for what they were supposed to do was really given, and then give stuff back from their horde to... well, not the guy doing the talking, but humans in general.
...For some reason I see the chance of success as 'very limited'.