The Necromancer is an epic Progressive rock song by Rush from their 1975 album Caress of Steel and is currently their fourth longest song, behind the Cygnus X-1 duology, 2112, and The Fountain of Lamneth. This was Rush's first attempt at writing an epic piece and, along with its partner The Fountain of Lamneth, was blamed for the commercial failure of the album.
This is the second Rush song to feature the character By-Tor, the first being "By-Tor & The Snow Dog" on the band's second album, Fly by Night. This song also contains a reference to the town of the band's formation, Willowdale. The song has not appeared on any Rush live album or compilation.
Progressive metal band Dream Theater covered this song during their "Six Degrees of Inner Turbulence" tour.