Question: Praises to the War Machine is an album by the vocalist who is currently the lead singer of what power metal band?

Context paragraphs:
Shadow Warriors (band): Shadow Warriors was a British comedy power metal band, formed by guitarist Sam Totman in late 2000 as a "secret" side project of DragonForce.  The band also featured ZP Theart as lead vocalist and two other Fictional members, drummer Jyuohki and bassist Kazuma, the two "members" are actually drum machine and bass parts played by Sam Totman.  The band performed Power Metal music with Japanese Warrior-based lyrics, such as Ninjas and Samurai.

Gamma Ray (band): Gamma Ray is a power metal band from Hamburg, northern Germany, founded and fronted by Kai Hansen after his departure from the German power metal band Helloween.  Hansen is the current lead vocalist, guitarist as well as the chief songwriter of Gamma Ray.  The band is known as one of the most prominent bands of the German heavy metal scene.

Mirror of Souls: Mirror of Souls is the second album by Christian progressive/power metal band Theocracy.  It was released by Ulterium Records on November 21, 2008 in Europe, November 26 in Japan, and December 9 in North America.  It is Theocracy's first album as a full band, as their self-titled debut album was a one-man project by current lead vocalist Matt Smith.  In Finland it was "album of the week" at Imperiumi.net website which called the album "clearly one of the best melodic power metal albums of the year".  In 2010, "HM Magazine" ranked it #16 on the Top 100 Christian metal albums of all time list.

Praises to the War Machine: Praises to the War Machine is the debut and only solo release/album by heavy metal vocalist Warrel Dane from Nevermore, released on April 25, 2008.  The album was produced by Peter Wichers, who was tapped by Dane to work on the album while Wichers was still a member of Soilwork.  After leaving that band in 2007, Wichers co-wrote the album with Dane and played on eight of its tracks.  Soilwork drummer Dirk Verbeuren and former Himsa guitarist Matt Wicklund also played on the album.  Nevermore guitarist Jeff Loomis and the band's touring guitarist at the time Chris Broderick make guest appearances, along with James Murphy, who had performed on the Nevermore album "This Godless Endeavor".  "Praises to the War Machine" includes two cover songs, The Sisters of Mercy's "Lucretia My Reflection" and "Patterns" by Paul Simon.  Dane had previously covered a Simon song on Nevermore's album "Dead Heart in a Dead World".

Ola Halén: Ola Sven Halén (born February 12, 1977) is a Swedish metal vocalist, currently with the melodic power metal band Shadows Past.  Between 2002 and 2010, he was the lead singer of the Stockholm-based power metal band Insania.

Frédéric Leclercq: Frédéric Leclercq (born June 23, 1978) is a French musician and producer.  He is the guitarist and main songwriter in the death metal supergroup Sinsaenum, the bassist and backing vocalist in power metal band DragonForce, and the guitarist and vocalist in Maladaptive.  He is a session musician for various other bands, including George Lynch's Souls of We.  He is also an ex-member of the French power metal band Heavenly and played several shows with Carnival in Coal in 2006.

Timo Kotipelto: Timo Antero Kotipelto (born 15 March 1969 in Lappajärvi, Finland) is the vocalist of the Finnish power metal band Stratovarius and is the creator and vocalist of the power metal band Kotipelto.  Kotipelto is currently the longest standing member of Stratovarius, after the departure of Timo Tolkki.

Peter Wichers: Peter Wichers is best known as one of the founding members of Swedish melodic death metal band, Soilwork.  From 1995 until late 2005, when he announced his departure from the band, he was known as the lead guitarist and also a songwriter, especially on their "Stabbing the Drama" album., He rejoined Soilwork in 2008 and played on 2010s The Panic Broadcast and in June 2012 he quit Soilwork for the second time.  After leaving Soilwork, he filled in for Adam Dutkiewicz when he was injured on Killswitch Engage's European tour.  More recently, he has collaborated with singers from across the melodic death metal genre including Anders Fridén, former band mate Björn "Speed" Strid and John Bush (vocalist of Anthrax) to make a CD much in the same style as "Roadrunner United", entitled "Nuclear Blast All-Stars".  He also co-wrote Warrel Dane's solo record "Praises to the War Machine".

Warrel Dane: Warrel Dane (born March 7, 1969) is the lead singer of the American power metal band Sanctuary.  He is also known as the former lead singer of currently inactive progressive metal band Nevermore.  He is a natural baritone, though he was known for his high-pitched vocals with Serpent's Knight and on the first two Sanctuary albums.  Later in his career, Dane became more notable for his distinctively deep, dramatic voice.

Maxi Nil: Maxi Nil (born 4 June 1981) is a Greek singer, and currently as of 6 December 2013, the lead singer of her new project Jaded Star.  Maxi is best known for her work as lead vocalist in the Austrian symphonic power metal band Visions of Atlantis from mid 2009 to late 2013.  In 2003 she joined the Greek metal band On Thorns I Lay and in the same year she also joined the band Elysion as both a singer and a songwriter.

Supporting paragraphs: Praises to the War Machine Warrel Dane
Answer: Sanctuary