Presenting… Arkham Twilight: Miskatonic Librarian!
I knew it! Finally, legitimization from a source with only one degree of separation from the princess herself! Now that Twilight Sparkle is involved up to her eyeballs in Mythos investigation, we can finally trade techniques and tips over coffee! Seeing those saddlebags has made me realize I need a new set.
There are several carefully documented photographs of her recent defeat of a notorious Mythos figure who shall remain unnamed, but whose designation is most easily rendered as ℭƭℎưℓℎư. (Just so you can be on the lookout. It sometimes leaves graffiti in certain obscure places around Ponyville.)