Leif
Adventurer
Hmm, I think I like it! But if they fail, there may be nothing left for Archangault to 'take care of.'So the BB Dragon sends the PCs on a quest to retreive an atrifact from a dungeon that he cannot reach. If they fail, he will take care of them personally. If they succeed, he will grant them each a boon. The artifact will actually require more than the dragon expects, leading to a continued relationship with the PCs.
A dungeon that Archangault can't get to... Why can't he? Surely he has magic available to do such minor things as change his size. No, there must be another reason. Like, he doesn't know where it is. Or it's being kept in a place that can only be reached from a different place where only Eladrin are permitted. Or something completely different.
And what kind of 'boon' would be appropriate for such a quest?