Named after one of the three Erinyes of Greek mythology, Megaira released their debut "Power, Lies and Death" in 2017, a concept album drawing on stories from Greek myth including the Minotaur, Icarus, and the punishing goddesses who lend the band its name. The record pairs guttural death metal vocals from Paulo Schmidt against the clean, heavy metal delivery of Annia Bertoni, layering thrash aggression with melodic power metal hooks and black metal atmosphere.

Originally active as Megatério from 1986 to 1990, the band reunited in 2006 when all original members crossed paths again at a Slayer concert in São Paulo. Their self-titled comeback album, released in 2008, was recorded at Papiris Studio using compositions written back in 1987, preserving the raw late-eighties thrash aggression that had defined the group's original run.

Memoria Hostil is a heavy/thrash metal band from Pablo Nogués in the northern suburbs of Greater Buenos Aires, formed in 2018 with a lineup of Sergio Soto on vocals, Ivan and Alfredo Sturla on guitars, Leo Sturla on bass, and Pablo Mansilla on drums. The band released their debut album "Memoria 1" in August 2022, a six-track record featuring songs including "Mirando Al Sur" and "Mano Propia".

Mercilless carry on the raw thrash metal tradition of Leopoldina, Minas Gerais, a region that also spawned Deathraiser. The band channels the aggressive, politically charged spirit of the South American thrash scene, with early material appearing on the Deströyer Zine Compilation Vol. 1 alongside the track 'Lethal Disaster.'

Formed in 1988 in Salvador, Mercy Killing are stalwarts of the Brazilian thrash underground with a sound hardened by Kreator, Dark Angel, and Ratos de Porão. After cassette demos including 'Toxic Death' (1993) and 'Living in My Madness' (1995), the band returned with the 'The Thrasher!' demo (2013) and their crowdfunded debut album 'Euthanasia' (2015), a sixteen-track barrage of violent, anti-fascist thrash.

Metakiase is a two-piece heavy and stoner rock outfit from Pucón in Chile's Araucanía region, formed by drummer Tomás Trucco and guitarist/vocalist Vipe Schindler. Their 2015 debut album La Ruta de la Araucanía blends speed-injected thrash riffs with heavy blues and stoner grooves, drawing on the volcanic landscapes and Mapuche cultural heritage of their southern homeland.

Metal Warhead play speed-inflected heavy and thrash metal with a hardcore edge rooted in the Rio Grande do Sul underground. Their 2017 debut album 'Metal Avalanche' — an eleven-track statement of intent — signals a band locked into the classic late-1980s thrash aesthetic of brute riffing and relentless pace.

Metalepsia was a thrash/crossover band from Buenos Aires whose members included vocalist Facundo, guitarists Mariano Pampin and Tomás, drummer Yair Scarfia, and bassist Negra. The band released their nine-track album Síndrome de Demencia on February 18, 2015, blending aggressive thrash riffing with punk-inflected energy in the crossover tradition.

Metalepsia was a thrash/crossover band from Buenos Aires whose members included vocalist Facundo, guitarists Mariano Pampin and Tomás, drummer Yair Scarfia, and bassist Negra. The band released their nine-track album Síndrome de Demencia on February 18, 2015, blending aggressive thrash riffing with punk-inflected energy in the crossover tradition.