Celtic Frost's frontman, guitarist and singer Tom Gabriel Fischer, adopted the alias Tom Warrior. With Steve Warrior on bass, he formed one of the earliest extreme metal bands, Hellhammer, in 1981. Steve Warrior was later replaced by Martin Eric Ain – also a pseudonym. The band attracted a small international fan-base, got signed to Noise Records in Germany and recorded their debut EP "Apocalyptic Raids" in March 1984, now a rare find on eBay or second-hand record stores around the world.