Conversation so far:
What year was Reign in Blood released?
Reign in Blood is the third studio album by American thrash metal band Slayer, released on October 7, 1986 by Def Jam Recordings.
Was Reign in Blood well received by the critics?
Reign in Blood was critically acclaimed by the underground and mainstream music press.
Did Slayer win any awards for the album Reign in Blood?
The album Reign in Blood was Slayer's first to enter the US Billboard 200, peaking at number 94, and was certified Gold on November 20, 1992.
What were the hit singles from Reign in Blood?
How high did Angel of Death get in the charts?
Although Angel of Death did not chart, it was highly praised by critics reviewing Reign in Blood.
What did the band Slayer do following the release of Reign in Blood?
In October 1986, Slayer embarked on the Reign in Pain world tour, with Overkill in the US, and Malice in Europe.
Was the Reign in Pain world tour successful?
The band Slayer was added as the opening act on W.A.S.P.'s US tour, but just one month into it, drummer Dave Lombardo left the band.

Question: Why did he leave the band?
Self-contained rewrite: Why did Dave Lombardo leave Slayer during the Reign in Pain tour?