English heavy metal band Venom, from Newcastle, crystallized the elements of what later became known as thrash metal, death metal and black metal, with their 1981 album Welcome to Hell.[15] Their dark, blistering sound, harsh vocals, and macabre, proudly Satanic imagery proved a major inspiration for extreme metal bands.[16] Another highly influential band, Slayer, formed in 1981. Although the band was a thrash metal act, Slayer's music was more violent than their thrash contemporaries Metallica, Megadeth and Exodus.[17] Their breakneck speed and instrumental prowess combined with lyrics about death, violence, war and Satanism won Slayer a rabid cult following.[18] According to Allmusic, Slayer's third album Reign in Blood "inspired the entire death metal genre".[19] It had a big impact on the genre leaders such as Death, Obituary and Morbid Angel.[17]
Possessed, a band that formed in the San Francisco Bay Area during 1983, was attributed by Allmusic as "connecting the dots" between thrash metal and death metal with their 1985 debut album, Seven Churches.[22] While attributed as having a Slayer influence,[23] current and former members of the band had actually cited Venom and Motorhead, as well as early work by Exodus, as the main influences of their sound.[24][25] Although the group had released only 2 studio albums and an EP in their formative years, they have been described by both music journalists and musicians as either being "monumental" in developing the death metal style,[26]or as being the first death metal band.[27][28][29] Earache Records noted that "....the likes of Trey Azagthoth and Morbid Angel based what they were doing in their formative years on the Possessed blueprint laid down on the legendary Seven Churches recording. Possessed arguably did more to further the cause of 'Death Metal' than any of the early acts on the scene back in the mid-late 80's."[30]
During the same period as the dawn of Possessed, a second influential metal band was formed in Florida: Death. Death, originally called Mantas, was formed during 1983 by Chuck Schuldiner, Kam Lee, and Rick Rozz. In 1984 they released their first demo entitled Death by Metal, followed by several more. The tapes circulated through the tape trader world, quickly establishing the band's name. With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene. The fast minor-key riffs and solos were complemented with fast drumming, creating a style that would catch on in tape trading circles.[31][32]Schuldiner has been attributed by Allmusic's Eduardo Rivadavia as being "widely recognized as the Father of Death Metal".[33]Death's 1987 debut release, Scream Bloody Gore, has been described by About.com's Chad Bowar as being the "evolution from thrash metal to death metal",[34] and "the first true death metal record" by the San Francisco Chronicle.[35]