Uriah Heep (band) recording of the album, drummer Alex Napier was replaced by Nigel Olsson, recommended to Byron by Elton John. The debut was not popular with rock critics (especially in the USA where "Rolling Stone" reviewer Melissa Mills infamously promised to commit suicide "if this band makes it") but in retrospect the attitude towards it changed. "Those unfamiliar with Uriah Heep may want to try out "Demons and Wizards" or a compilation first, but anyone with a serious interest in Uriah Heep or the roots of heavy metal will find plenty to like on ..."Very 'eavy ...Very 'umble"," advised critic Donald A.
Speed metal German heavy metal scene, which emerged in the early to mid-1980s. Of particular importance was their 1982 track "Fast as a Shark". Speed metal eventually evolved into thrash metal. Although many tend to equate the two subgenres, others argue that there is a distinct difference between them. In his book "", Ian Christe states that "...thrash metal relies more on long, wrenching rhythmic breaks, while speed metal... is a cleaner and more musically intricate subcategory, still loyal to the dueling melodies of classic metal." However, on the very next page, Christe calls speed metal a "subset of thrash metal" and