The Black Soulstone Killing Zoltun Kulle Act II With Crusader Diablo III Reaper of Souls

Objectives -- Locate the Terminus and activate the two relics. Each relic is a rather lengthy mini-dungeon or room. Locate Kulle's body in the third portal. Go back to the Terminus and talk to Leah. Fight the boss, Zoltun Kulle. The Black Soulstone is in the middle of the chamber, over the bridge, after the boss fight.