There are multiple artists with this name: 1) Ignis Fatuus is a progressive metal band from Oulu, Finland, founded by Ilkka Harjula and Jarno Juntunen in 1992. The very first demo from this two-headed group was published in 1993. This unnamed tape contained very hard metal music both extremely fast and slow. The influences were Carcass and Paradise Lost at that time. Nowadays, Ignis Fatuus plays progressive metal with melodic riffs and growl vocals. Latest album, "Fiends" (2009) you can download from their homepage. Read more about Ignis Fatuus on Last.fm.