My Little Pony: Friendship Is Magic — IDW Publishing
Issue: #51
Twilight is startled to find that the most important history books in Equestria are going missing. Will she and her friends be able to uncover the identity of the mysterious new villain responsible?
First appearances: Shadow Lock
Creators: Bobby Curnow, Heather Breckel, Neil Uyetake, Nicoletta Baldari, Sara Richard, Tony Fleecs, James Asmus
Characters: Shadow Lock, Rainbow Dash, Applejack, Twilight Sparkle, Fluttershy, Pinkie Pie, Rarity, Lyra Heartstrings, Spike, Sweetie Drops