...Well, according to... uh, me... 1: He breathes fire. 2: He's got huge treasure hoardes that he guards with his life, having counted every piece by heart. 3: He's got amazingly hard dragon scales that keep him safe Spoiler: Spoilers from the book DON'T CLICK IF YOU DON'T WANT POSSIBLE MOVIE SPOILERS Except for that one scaleless spot that the arrow finds... 4: He is brilliant and intelligent and ruthless, and is not easily duped. 5: His sense of smell is strong, and he can pick up a scent with no trouble at all. You know, now that I think about it, these things aren't necessarily good for us. Actually, strike that. Uh, I mean, I'll strike that. ANYWAY. These things aren't good for Bilbo and Company. They are very good for us, as it will make for an excellent night at the theater.
1. His armor is like tenfold shields. 2. His teeth are like swords. 3. His claws spears. 4. The shock of his tail is a thunderbolt. 5.1. His wings a hurricane. 5.2. His breath is death!