was a Chaos
warlord who attempted to invade Ultramar
in late M41
. Thanks to Chief Librarian Tigurius
's prescience, however, the Ultramarines
were lying in wait when Niadar's fleet emerged from the Warp
. Only one of Niadar's ships made planetfall, on Calth
, and the Chaos forces it disgorged were swiftly cornered and destroyed. Niadar himself was presumably captured or killed.
In the novels Courage and Honour (Novel) and The Chapter's Due (Novel) by Graham McNeill, Niadar's name is spelled "Nidar," with only one "a".