MAP11: Circle of Death (named "'O' of Destruction!" on the automap) is the eleventh map of Doom II. It was designed by John Romero and uses the music track "The Healer Stalks". The automap name is a reference to the Hoe of Destruction in the Ultima series of games, of which Romero is a fan http://www.formspring.me/theromero/q/770820898 src. This map also introduces another new enemy, the arch-vile.