Question: Which vocalist left the band whose fourth full-length album is Destroyer?

<P0-S0> Arvas, formerly known as Örth, is a Norwegian black metal band formed in Bergen in 1993 as a one-man project by multi musician V-Rex. <P0-S1>  In Summer 1996, Borknagar drummer Grim and Gorgoroth bassist Ares joined the band. <P0-S2>  They recorded an album in Winter 1996, titled "Nocturno Inferno", but it was never released. <P0-S3>  After Grim committed suicide in 1999, V-Rex decided to keep on going as a one-man project, but changed the band's name. <P0-S4>  He recorded two demos, "Countless Souls at Dawn" and "I Am Thy Grief", and a split album with Hordagaard titled "Dawn of Satan/Uncle Satan", which was released by Azermedoth Records. <P0-S5>  The band's first official full-length album "Blessed from Below – Ad Sathanas Noctum" was released in 2010 by the band themselves. <P0-S6>  Their second album "Into The Realm Of The Occult" was released in November 2013 by Italian label ATMF Records, to be followed in March 2015 by "Black Satanic Mysticism", via Aeternitas Tenebrarum Music Foundation. <P0-S7>  Arvas has shared stages with bands like Throne Of Cartasis, Urgehal, Dauden, 1349, Mongo Ninja, Nocturnal Breed. <P0-S8>  In March 2013 Arvas toured the east European countries supporting Deicide on their 'End Of The World Tour'. <P0-S9>  The band's fourth full-length, "Black Path", was released on 24 March 2017 by Mighty Music. <SEP> <P1-S0>  They added a vocalist and bassist, John Johansen and Nick Wendel (Respectively). <P1-S1>  Peter released his first solo EP "Cleopatra" in 2004 on Elkion Records. <P1-S2>  In 2003/2004, Elkion Records released "Savor The Danger" which contained a collection of old demos and the 2 songs from the 7" previously released on the label. <P1-S3>  The Working title for the album is"On the Wall" and there are 2demos available on Soundcloud.com. <P1-S4>  In the summer of 2001 the band parted ways with vocalist John Johansen. <P1-S5>  Peter is currently working on his first full-length album, titled "Wildlife". <P1-S6>  Debuting a new sound, The Stryder continued to tour the country in support of the new release. <P1-S7>  Scottie Redix now plays under the moniker 'Cassonova Brown' and is currently working on his first full-length. <P1-S8>  Scottie is also a member of the musical collective Teachers, who also have a full-length album titled "Anesthesia" slated for an early 2013 release. <P1-S9>  Durijah moved on to become the drummer of Classic Case and in 2007, became Pete Parada's replacement in Saves The Day. <P1-S10> The Stryder was a band hailing from Long Island, NY. <P1-S11>  The band toured extensively and began writing new material in 2001. <P1-S12>  They released a 7" on Elkion Records titled "The Hits Just Keep on Comin" and shortly after signed a deal to Equal Vision Records and released their debut album "Masquerade in the Key of Crime" in the summer 2000. <P1-S13>  They added former Glassjaw drummer Durijah Lang, and moved Scottie Redix up to Guitar and backing vocals. <P1-S14>  The Band was formed by Peter Toh and Scottie Redix in 1999 after their previous project, Yearly, disbanded following the departure of bassist Eben D'amico who left to join Saves the Day. <SEP> <P2-S0> Kristian Eivind Espedal (born 7 August 1975), better known by his stage name Gaahl, is a Norwegian vocalist and artist. <P2-S1>  He is best known as the former frontman of Norwegian black metal band Gorgoroth. <P2-S2>  He is also the founder and frontman of Trelldom and Gaahlskagg. <P2-S3>  Since leaving Gorgoroth he has been involved with God Seed, Wardruna, and Gaahls Wyrd. <P2-S4>  He was the focus of the documentary "True Norwegian Black Metal" and also appeared in the film "Flukt". <SEP> <P3-S0> Destroyer – or About How to Philosophize with the Hammer is the fourth full-length album by Norwegian black metal band Gorgoroth. <P3-S1>  It was their first release on Nuclear Blast. <P3-S2>  It contained eight tracks performed by several different lineups, with band founder Infernus being the only member to be featured on all tracks. <P3-S3>  Four different vocalists were featured on the album, including Infernus on two tracks, Pest on four tracks, and T-Reaper and new vocalist Gaahl each on one track.