Nyx finds herself in the Pony version of Purgatory after Twilight brings a special mirror to the Library. There she finds the lost soul of an Equestrian hero, Snowdrop.
Zevan was a loyal changeling and did his queen's bidding, although he questioned why she had broken the peace. After being badly injured though, he had to reconsider his future, and a unicorn mare with a broken horn was a surprising part of it.