In the foggy past, long before the time of Starswirl, or the unified land of Equestria, an aged human sorceress by the name of Somnambula stewed in the bitterness of defeat after her attempt to drain the youth of the ponies of Paradise Estate. Unwilling to throw in the towel, she schemed to create servants bound to obey her, servants who could collect life force for her - the first changelings.
While this story contains some degree of death, violence and gore, these are given little relatively detail. Though there is a Somnambula tag, it refers solely to the pegasus by the same name, hence the 'other' tag.