Ranger - "Higher Vampire" [5th Campaign, 5th Mission]

Why are shackles needed? He is reborn at night. You need the phoenixes from the hut in the quest. I encountered him for the second time and defeated him to get the phoenixes. You need 4 artifacts from the dwarf kings to get them. I turned in all the items, and there were 5 phoenixes, but that was enough. I replaced the Death Knights with phoenixes. Nicholas was reborn in the castle nearby.