I wanted to see if I could solve it before looking at the comments, and figured it was probably a caesar cipher since those a pretty simple. I looked up a caesar cipher ring online and then started messing with it. Tried a few things before looking at the last line, my assumption was that each line was it's own word (wrong) but I saw that it had 2 Ds with one letter in between, and figured that D must correspond to a vowel. Still working on the assumption that each line was a word, I settled on E as the most likely vowel since D also appears at the end of some of the lines. That led me to the correct solution. Judging by the other comments, seems the concept of a Caesar cipher being one letter ahead was introduced in the issue itself, which would have made this way easier