The third in a trilogy of crossover pieces which I did in my spare time. I figured that Cato Sicarius in The Emperor had a Text to Speech Device series sounded like an exaggerated version of Trixie in mannerism, so I drew that. Someone on Derpibooru commented that if that were the case, then Starlight would be Calgar, so I drew that, too. After that, I knew that the logical next step would be Twilight. I figured that she would be Tigurius since she is the most magically powerful, and values information, study, and knowledge the most. Also, she lives in a library, and Tigurius is the head of the Librarius. Also, Twilight has been shown to overcome any challenge and enemy that comes her way sooner or later, just like Tigurius. 

Warhammer 40k © Games Workshop

MLP:FIM © Hasbro and Lauren Faust