Answer: Man vs. Supernatural
Explanation:
A conflict is refered to as a struggle that occurs between two opposing forces.
Man vs. the Supernatural is a form of conflict which is when the man faces opposition in the form of a supernatural force like a ghost, fate, superstitions.
In this case Erowyn faces opposition from an email wizard.
In The Red Badge of Courage, when Henry wakes up in camp the day after fighting, he first think he is in a Charnel place because the sleeping men around him look dead.
1) Find the object of the preposition.
2) Ask yourself which other word in the sentence is related to this noun or pronoun by the preposition.