Conversation so far:
was Missiah the last album?
His sixth installment in the Mixtape Messiah series was to be a "prelude" to Venom.
what year did messiah release?
The first disc from Mixtape Messiah 7 was launched for free download on August 4, 2009, just after 11:30 pm EST, while Disc 2 was released on August 6, 2009.
when did venom come out?
Venom has been confirmed as cancelled as Chamillionaire has parted ways with Universal.

Question: what artist did he work with?
Self-contained rewrite: what artist did Chamillionaire work with?