You must collect four scout reports inside 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, (ALL group members must be underwater or the encounter will break) and examine the wounded scout that spawns at the foot of the ramp up to The Maw of Mortality to receive the first scout report. You may be able to spawn the wounded scout by JUST killing GULP, even if you cannot kill both Lureclaw and Gulp. As of 3-18-11, killing Gulp alone resulted in Lureclaw re-spawning a new Gulp - and the appearance of the wounded scout on the ramp. If the wounded scout does appears on the ramp you can just right click examine him and get the first scout report even if you then leave Lureclaw and Gulp alive.
To spawn them, kill all mist grinnin netslingers in the water area of the third floor, not just below below the waterfall, then kill the second wave of 2 groups of assorted mist grinnins that spawns.
Kill Dvith N'Zur in the room of vampires down the ramp on level 3 to the east of where you kill Chief Strongarm. You can find the ramp by locating the two fleshgoyles at the top of the ramp which leads down to the The Hand of the Crypt. Blow up a wall and continue to the room with Dvith N'Zur. Examine the wounded scout for the second scout report.(if the scout is already there - killing the named is optional, you can just examine the scout; otherwise kill the named to spawn the scout) ( -75, -36, 104 ) /waypoint -75, -36, 104
Spawn and kill The Mold Reaper ( 36, 1, 12 ) /waypoint 36, 1, 12, or alternatively at ( 75, 6, 5 ) /waypoint 74.80, 6.34, 4.76 and examine the wounded scout that collapses at your feet for the third report.
To spawn him, clear all of the mist grinnin sporechanters in the immediate area, then kill the second wave that spawns.
Spawn and kill Chief Strongarm ( 36, -26, 60 ) /waypoint 36, -26, 60 and 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. Then kill the three mist grinnin summoners who spawn and start chanting in the central area. The Chief (who is not attackable yet) will the summon four mudrakers (35^Heroic). Once they are killed Chief Strongarm will become attackable.