Kill all the other mobs in the area and the moor souls will spawn.
a moor soul
Return to the grimling memory ( -136, 85, -691 ) Copy/waypoint -136, 85, -691.
hunt and gather the following
Hunt 6 saurek darkclaw rockhoppers for weapon parts around ( -738, 40, -285 ) Copy/waypoint -738, 40, -285 and ( -741, 41, -481 ) Copy/waypoint -741, 41, -481 .
a saurek darkclaw
Gather 8 Scalebark Sludge for poison. Not trackable. They are found at the base of trees. Some possible locations:
( -762, 41, -488 ) Copy/waypoint -762, 41, -488
( -689, 41, -501 ) Copy/waypoint -689, 41, -501
( -695, 42, -485 ) Copy/waypoint -695, 42, -485
( -701, 46, -450 ) Copy/waypoint -701, 46, -450
( -732, 47, -436 ) Copy/waypoint -732, 47, -436
( -720, 44, -414 ) Copy/waypoint -720, 44, -414
( -755, 43, -392 ) Copy/waypoint -755, 43, -392
( -753, 41, -354 ) Copy/waypoint -753, 41, -354
Scalebark Sludge
Return to the grimling memory ( -136, 85, -691 ) Copy/waypoint -136, 85, -691.
Return to Grelas the Old ( -837, 43, -800 ) Copy/waypoint -837, 43, -800.
Note: If you are also on the quest: Reign of Shadows: Facing the Savage Beast turn to your left and harvest Khati Sha's third phylactery you are now able to advance that quest since completion of this quest was a pre-requisite.