Magnificent Bastard: Loki, who has the telling nickname "The Magnificent". True, he probably gave himself the title as an act of arrogance, but as he proves in Chapter 14, he more than deserves it. He engineered the entire plot up until that point, both eliminating Celestia as a threat and creating a situation wherein Big Mac would have no choice but to surrender Thor's powers to him, which is exactly what happened. Then, when Trixie betrays him, he shows that he anticipated it, and handles it easily. Hell, he even manages to die with class — when Thor defeats him, he revels in the fact that his death will create the world ruled by magic he wanted, then goes out with a smile.
Oh, and it's worth noting that the only reason he lost is because Pinkie turned out to be a bigger Spanner in the Works than he was able to anticipate.
Moral Event Horizon: Loki and Trixie border on this when they threaten to kill Pinkie in order to force Thor to surrender. Especially Trixie, who seems a little too happy describing how it would happen.
Strangled by the Red String: Some of the romance between Caramel and Spitfire is a bit forced, with them shifting towards being a couple after interacting for less than half a month.