Mannon
From Warhammer 40k - Lexicanum
Mannon was the former Chief Librarian of the Crimson Sabres, who became the warband's Chief Sorcerer after their transformation into the Crimson Slaughter Chaos Space Marines.[1]
Mannon guided Lord Kranon and was one of his chief confidantes. However, it was eventually revealed that Mannon had been possessed by the Lord of Change Tzax’lan-tar, who had been manipulating Kranon and the Crimson Slaughter to his own ends. When uncovered, Tzax’lan-tar burst from Mannon's body, killing him.[1]
