Question

Which poetic device does the speaker use in the line, “Since Bacchus, Satan, and the Hangman”?

Answer 1

The speaker is using allusion it this line.
Allusion is a figure of speech in which something outside of the source text is being referred to. So here, Bacchus, Satan, and the Hangman aren't actually characters in this literary piece of work, but the author is making a reference to them nevertheless.