What metal group released their  second album  in 1999 by Season of Mist, who has had a Norwegian black metal band formed in 1984 in Oslo on their roster?
Mayhem (band) Mayhem is a Norwegian black metal band formed in 1984 in Oslo. They were one of the founders of the Norwegian black metal scene and their music has strongly influenced the black metal genre. Mayhem's early career was highly controversial, primarily due to their notorious live performances, the 1991 suicide of vocalist Per Yngve Ohlin ("Dead") and the 1993 murder of guitarist Øystein Aarseth ("Euronymous") by former member Varg Vikernes ("Count Grishnackh"), of Burzum.
A-ha A-ha (usually stylized as a"-h"a; ] ) is a Norwegian band formed in Oslo in 1982. The band was founded by Morten Harket (vocals), Magne Furuholmen (keyboards) and Pål Waaktaar-Savoy (guitars). The group rose to fame during the mid-1980s after being discovered by musician and producer John Ratcliff, and continued global success in the 1990s and 2000s.