Talk to Antiquitor Kantus Mor'Tael (-235, 135, -8) to get the quest. Inspect the book next to him titled 1001 Tales of Maj'Dul, then write your name, write the title "The Undead Fate of Dalgin B'Dynn" and then keep clicking next page until you update.
Locate A coiled rock (Hullcrusher Rock) in Sinking Sands ( -1802, -228, -287 ) /waypoint -1802, -228, -287.
Run up the path, past the Sirens until you reach a climbing point (around the corner of the rock), The Sage of Sea Winds will spawn and attack. Keep going to get rid of the sirens and turn around to face The Sage of Sea Winds.
Examine the gravestone in the croc caves ( -1239, -234, -832 ) /waypoint -1239, -234, -832.