Starlight Slasher

The Starlight Slasher was the name given to gruesome murders discovered in Gilneas. Their primary victims were "Greymane loyalists", leaving many to believe that these murders were done by remnants of the Northgate rebels. In truth, these murders were done by the Gilnean Wolfcult as an initiation right for Ralaar Fangfire to turn them into worgen.

Trivia
The Starlight Slasher is mentioned in The Art of Cataclysm in a letter by Lorna Crowley.