the last in Mike Portnoy's series of songs about his 12-step recovery from alcoholism, as well as the song "The Best of Times", described by Portnoy as "a real heavy personal subject about my dad who passed away during the making of the album ... He was battling cancer throughout its making." The band also embarked on a second Progressive Nation tour, including the tour's first performances in Europe. Opeth, Unexpect and Bigelf supported Dream Theater in Europe, while Zappa Plays Zappa, Pain Of Salvation, and Beardfish were slated to perform on the North American leg. However, Pain of Salvation and Beardfish were unable to tour with Dream Theater and Zappa Plays Zappa because of financial troubles within their respective record labels. The two new bands that filled the vacated slots for the Progressive Nation 2009 tour in North America were Bigelf and Scale the Summit with Bigelf performing on both European and North American legs. After the Progressive Nation Tour, Dream Theater re-entered the studio to write and record a brand new instrumental track for inclusion on the God of War III soundtrack EP God of War: Blood & Metal. The track, titled "Raw Dog" (God (of) War reversed), marked the first time that the band has written and recorded an exclusive track for an outside project. "Raw Dog" includes the first ever commercially recorded harpejji track, performed by Jordan Rudess, as well as Dream Theater's final recorded performance with Mike Portnoy on drums. In December 2009, during their Black Clouds & Silver Linings tour whilst visiting Australia, Dream Theater appeared with one support act, Pain of Salvation. In March 2010, they toured South America with Bigelf. Afterwards, during the summer of 2010, Dream Theater supported Iron Maiden on the US and Canadian legs of their summer tour which were the last shows DT played during 2010. Mike Portnoy's departure and arrival of Mike Mangini (2010–2011) On September 8, 2010, Mike Portnoy announced that he would be leaving Dream Theater, citing better relationships in other projects, burnout, and his desire for a break as reasons. Elaborating on the situation for MusicRadar, John Petrucci revealed that originally, Portnoy did not want to leave the band; he only wanted to take a five-year break. He eventually dropped this number to around one year. Only after the rest of the band rejected his proposal did Portnoy decide to quit. After Portnoy left