Quest NPC Locations
The first two (2) quests are given by Captain Gul, a giant in The Steppes (found just south of the western end of the tunnel that links the Giant and Gnoll sections).
Lost Souls I
Lost Souls II
Duskmold
per ZAM - "Priest Ulkag stand[s] at Loc 2150, 670, high on the northern cliffs of The Steppes, overlooking the Giant areas."
Serric Lives
per ZAM - "Orumot [Uluntar] stands on the cliffs just north of the entry to the Bear cave [at loc 593.09, 1210.86 in The Steppes]."