The two dramatic elements that help advance the plot in the second paragraph of the excerpt are setting and character description.
The setting is established through descriptions of stormy nights and the chaotic environment, which contributes to the protagonist's fears and the atmosphere of tension. Character description is demonstrated through the details about the seafaring man with one leg, which is central to the narrator's anxieties and nightmares. Together, these elements enhance the narrative by providing insight into the character's struggles and fears, leading to the development of the plot.