Fleshing out my dragon dude some more. As a very long-lived, all-around smart person, he's sometimes consulted on matters involving exotic realms of hyperdimensional physics. Questions regarding parallel universes, time travel, heading off the heat death of a pocket universe. He knows a lot and he can apply his knowledge in ways that can be useful if the price is right.
His academic methods are sloppy, his mannerisms rude, and he's prone to long bouts of heavy drinking and debauchery. He claims it helps him to better focus.
The clock is ticking, Smaug...we need results.