A movie about dragon hunting

Hey does anyone know the name of a movie from maybe fifteen years ago in which there were a group of dragon hunters who extracted smth like oil from dragons’ hearts. The main character had a ginger friend with curly hair and bread who was quit guy and good at his job.I liked him tbh.They killed a bunch of dragons in their sleep but somehow didn’t get their hearts and it would curse them according to the ginger guy when they were going back with the ship.