If you are death like I am, you might be wondering how to kill osseous Nightreaver. First, you need the wicked mantle, the chaos armor, and the wicked walkers. After that, you get the best athame and ring you can. Then you get the deck of last resort. Equip it with lots of prisms, death shields, death traps, feints, curse, death blade spirit blade and about five wraiths. Then you keep boosting boosting boosting then attack. I killed him in three attack plus one for the minion.