gravedigger quest bugged

[IMac]

when you enter in the necromancer servant's room with a friend only 1 necro servant respawns

 

[Mark]

Whoever went down first should kill and loot it, and then another one will spawn when you go up and down. If it doesn't and you're stuck at that mission, go to Omrabas and say "lost" to get a new chance to kill the necromancer servant.