Opeth is a progressive metal band from Sweden that is influenced by many diverse musical styles ranging from jazz, 1970s progressive rock, death metal, and blues. Their recent releases have deviated from their traditional death metal influenced style, with more emphasis on progressive elements. Vocalist Mikael Åkerfeldt is also noted for utilizing both clean singing and death growls, often in the same track.
Aeon of Horus is a progressive/technical death metal band formed in Canberra, Australia in 2006. Their style consists of of fast and heavy technical riffs, blasting drums and powerful growls. Aeon of Horus have released one self titled demo/EP and one full length album entitled, "The Embodiment of Darkness and Light" to positive acclaim. After parting ways with guitarist Barry Feeney and bassist Chris Pratt in 2009, Aeon of Horus announced on the 19th of September 2010 that the band had found a new guitarist and bassist.