SYMBOL 1: Spawn Dvith N`Zur ( 56, -41, 114 ) /waypoint 56, -41, 114 by killing all five groups of Neonate vampires on the third (bottom) level. When he spawns, he will not be attackable.
Kill the 4 nightmares of Dvith (before the nightmares you must kill ALL vampires on the same level as Dvith) to make Dvith N`Zur respawn as an attackable foe. He may respawn underwater at the bottom of the waterfall. If he disappears while under the waterfall, type "/target dvith".
Kill Dvith N`Zur for the Symbol of Trev. Group Update
Open the coffin at the very back of The Maw of Mortality at ( -84, -22, -62 ) /waypoint -84, -22, -62 to find the Symbol of Veth. Not a group update, everyone MUST click once.
SYMBOL 4: Examine a coffin slightly north of Nilith T`Feyd ( -102, -24, -27 ) /waypoint -102, -24, -27 for the Symbol of Ythe. Not a group update, everyone MUST click once. Note that this appears in quest log as the fourth symbol.
Kill Rhayn T'Dax ( 54, -23, -101 ) /waypoint 54, -23, -101 for the Symbol of Raet (in the tunnel between the first and second levels).