I have begun The Living Darkness, a celebration of Friendship is Magic season 4, the Doctor Who 50th anniversary, the Christmas season and Matt Smith leaving the programme (less a celebration and more a farewell in that case). The story is about Clearwin, a Unicorn mare living in Ice Draught, a Unicorn settlement more than 1000 years before Twilight came to Ponyville. Right before she is killed, Clearwin finds herself whisked away by a mysterious Earth Pony stallion calling himself the Doctor. They end up in a frozen, ruined Equestria where ponies are hunted by the "Dark Ones". The Doctor and Clearwin must help Twilight Sparkle's resistance against the Dark Ones and discover what happened to Equestria.