There is more than one artist named Narcosis:

1) Narcosis is a legendarian peruvian Punk Rock band. They released a demo on 1985 which is now one of the most important referents in the peruvian and southamerican punk scene. They had a very raw sound, influenced mainly by The Stooges.

2) Narcosis are an unrelenting grind band from the United Kingdom who combine blistering speed with near inhuman vocals. Hear tracks from their new album Romance here http://www.myspace.com/narcosisgrind