The style change was a common denominator in most proto/death-black metal bands from Brasil, in 1989/1990
Sarcófago, Vulcano, Mutilator, Dorsal Atlântica, etc. changed skin for 3rd time (many started as heavy metal) and just like Slayer was a main influence for this bands in early/mid 80´s, Metallica´s popularity and the arose of bands like Testament changed things.