Part of the Wibblyverse Continuity.
Part eleven of Doctor Whooves: Friendship is Wibbly Series 1
Previous Story: The Legion of Bronze
Next Story: Ruler of Everything

Sweetie Belle is the last Crusader without a mark. Feeling abandoned and lonely, she asks the Doctor to take her to the Crystal Empire, where her parents are vacationing. However, a glitch in the TARDIS means they arrive a little early; specifically, right at the end of Sombra's reign. However, there may be more to this empire than meets the eye. The king is a puppet, and the walls themselves are full of negative energy. The travelers find themselves in a fight for their very minds against the empire itself.

Violence tag for armed guards, references to torture, and open rebellion.
Also warning for mind control, detailed descriptions of despair, unsettling metaphors, and taking a chisel to the fourth wall once or twice.