Painted Blood (2009), Exodus' Exhibit B: The Human Condition (2010), Overkill's Ironbound (2010), Anthrax's Worship Music (2011), Testament's Dark Roots of Earth (2012), and Flotsam and Jetsam's Ugly Noise (2012). More recent bands of the genre, such as Havok and Legion of the Damned have turned their focus towards a more aggressive rendition of thrash metal, incorporating elements of melodic death metal. Spin-off genres Thrash metal is directly responsible for the development of underground metal genres, such as death metal, black metal, and groove metal. In addition to this, metalcore, grindcore, and deathcore employ similar riffs in their composition, the former with more focus on melody rather than chromaticism. The blending of punk ethos and metal's brutal nature led to even more extreme, underground styles after thrash metal began gaining mild commercial success in the late 1980s. With gorier subject matter, heavier down tuning of guitars, more consistent use of blast beat drumming, and darker, atonal death growls, death metal was established in the mid-1980s. Black metal, also related to thrash metal, emerged at the same time, with many black metal bands taking influence from thrash metal bands such as Venom. Black metal continued deviating from thrash metal, often providing more orchestral overtones, open tremolo picking, blast beat drumming, shrieked or raspy vocals and pagan or occult-based aesthetics to distinguish itself from thrash metal. Thrash metal would later combine with its spinoffs, thus giving rise to genres like blackened thrash metal and deathrash. Groove metal Groove metal takes the intensity and sonic qualities of thrash metal and plays them at mid-tempo, with most bands making only occasional forays into fast tempo, but since the early 1990s, it started to favor a more death metal–derived sound. Thrash metal with stronger punk elements is called crossover thrash. Its overall sound is more punk-influenced than traditional thrash metal but has more heavy metal elements than hardcore punk and thrashcore. Regional scenes Thrash metal emerged predominantly from a handful of regional scenes, each of which was generally distinguished by the unique characteristics of its bands. Bay Area thrash metal, also known as West Coast thrash metal: In addition to being the most commercially successful, the West Coast's thrash metal, as well as the Northwest and Southwest regions (including California, Washington and Arizona), tended to be the most progressive and technical of the major regional thrash scenes, being strongly NWOBHM influenced. Metallica, Megadeth, Slayer, Testament,