Post-Wrathgate quests with Varimathras

To whom it may concern,
I have completed the "Wrathgate" quest chain which results in the NPC character Varimathras being killed after the quest "Battle for the Undercity". He no longer appears in the royal quarter of the Undercity upon completion of this quest.

Unfortunately this means the quest i just obtained "An Unholy Alliance" CAN NOT be turned in becuase it requires me to visit Varimathras.

This quest is now impossible for me to finish because of the "Battle for the Undercity" quest.

PLEASE, i have had this issue for long enough, PLEASE find a solution to this problem. I know there are others.

Yours sincerely,
Infernatus