The 25th Anniversary Edition of the album featured another collaboration with Mike Patton, "Mine".
And on Against:
Singer João Gordo from the Brazilian Hardcore Punk band Ratos de Porão appears on "Reza"
"Hatred Aside" features Jason Newsted performing baritone guitar, theremin and vocals
A B-side from the album, "The Waste", featured Mike Patton on vocals. The album version is an instrumental titled "Kamaitachi" - both versions feature the Japanese taiko troupe Kodo.
Mike Patton has also performed "Lookaway" with Sepultura a few times in concert. Considering these occurrences and his studio collaborations with the band, he seems to really like working with Sepultura.