You must collect four scout reports inside The Tombs of Night: A Search For Answers. The reports are found on Wounded Scouts in the zone. These are spawned by killing the various mini-bosses in the zone with the exception of the second. The other three are spawned via mini-ring events that are described below.
Spawn and kill Lureclaw the Angler and Gulp, at ( 56, -41, 121 ) /waypoint 56, -41, 121 then examine the wounded scout.
Examine the wounded scout that collapses at your feet for the third report.
Spawn and kill Chief Strongarm ( 36, -26, 60 ) /waypoint 36, -26, 60 then examine the wounded scout that collapses at your feet for the fourth scout report.
To spawn him, kill all mist grinnin ruffians around The Maw of Mortality note that ruffians are found not just in the immediate area, but also found around ( -67, -24, -62 ) /waypoint -67, -24, -62 and ( -7, -24, -93 ) /waypoint -7, -24, -93.