When Rainbow Dash never performs her Sonic Rainboom, how is everypony else affected?

A deranged pony is on a killing spree, writing the biography of his victims.

Local Ponyville librarian Twilight meets Jack Harkness, and her life changes forever.

Pinkie must bake the sacred cake of partyness ion order to save Equestria.

Strange dreams and sleep patterns with something more sinister at play.

When socks take over Equestria, Author must save everypony. (comedy)