GUIDE:
The captain is located in the courtyard of Devil's Crossing prison, a
short distance from Hangman Jarvis. Talk to him, and he will explain
that Something is reanimating the dead with Aetherial energy and that he
would like you to put a stop to it.
After talking to Bourbon, head north across the bridge and make your way
through the ruins of Lower Crossing, following the directions given by
Bourbon. Eventually the Lower Crossing Riftgate can be found by a fork
in the road, and activated. Follow the road left and up Burial Hill to
the cave entrance.
Once you have entered The Burial Cave,
find and kill the boss creature Kyzogg the Reanimator. He is located in
the south-east corner of the cave, and can summon a number of minions;
these are best thinned out or separated from Kyzogg.
After killing the Reanimator, report back to the Captain to claim the reward.