A minor accident in the Crystal Library prompts Cadance to ask for Twilight's help locating a unicorn who might be capable of helping with reconstructing the spells lost during the accident.

A unicorn going by the name Rubato, known in most circles as a noble from one of the older Equestrian families and in some smaller ones as the only pony alive who has whored his way through almost all of Equestria.

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