I have the quest but I cant find him. I know he`s behind Zanetta Stormbreaker but he isnt there
When you go down the steps right behind Zanetta Stormbreaker, at the bottom of the steps you must use the crystal stand (press "x"), and Boris BlackRock will appear.
If he isn't there, try switching realms and use the crystal stand again. Make sure you go to the bottom of the steps too.