Sepultura's fifth album, "Chaos A.D.", was released in 1993. It saw a departure from their death metal style, adding influences of groove metal, industrial and hardcore punk. While "Chaos A.D." is not a death metal album, the album does include elements of thrash metal music. AllMusic gave the album 4.5 stars out of 5 and wrote that, ""Chaos A.D." ranks as one of the greatest heavy metal albums of all time." In 1994, Max and Igor collaborated with Alex Newport of Fudge Tunnel to form Nailbomb. They released an even more industrial-oriented album, "Point Blank" the same year. The group performed only one full live gig at Dynamo Open Air in 1995, and the performance was released as "Proud to Commit Commercial Suicide". Nailbomb was disbanded shortly afterwards. Sepultura's sound change continued with their sixth album, "Roots", which was released in 1996. On this album the band experimented with elements of the music of Brazil's indigenous peoples, and adopted a slower, down-tuned sound. The album was hailed as a modern-day heavy metal classic and a major influence on the then-nascent nu metal scene. AllMusic gave it 4.5 stars out of 5 and said, ""Roots" consolidates Sepultura's position as perhaps the most distinctive, original heavy metal band of the 1990s." In 1996, Sepultura performed "War (Guerra)" for the AIDS benefit album "" produced by the Red Hot Organization. In August 1996, Sepultura played on the Castle Donington Monsters of Rock main stage alongside Ozzy Osbourne, Paradise Lost, Type O Negative, Biohazard, and Fear Factory. The band was suddenly a three-piece with Andreas Kisser taking over on lead vocals, after Max Cavalera left the concert site earlier in the day upon learning of the death of his stepson Dana Wells in a car accident. After Dana Wells' funeral was finished, Max returned and continued to tour with Sepultura. A few months after Wells' death, the band had a meeting with Max and said that they wanted to fire their manager Gloria Bujnowski, who was Max's wife and Dana's mother, and find new management. Their reasoning was that Bujnowski was paying too much attention to Max and not enough to the rest of the band. Max, who was still coming to terms with the death of Wells, felt betrayed by his bandmates for wanting to get rid of Bujnowski and abruptly quit the band.