"My scanners are detecting a massive amount of radioactivity to the north-west. It looks like The Great Evil's energy weapon has actually pulled a ship from Hell into this dimension. If this is the same ship I've heard of, Lieutenant Koogar should be aboard. Koogar is one of the Great Evil's most ruthless minions. We should take this opportunity to take him out. Your compass will guide you."
Leave Nichol's house and follow your compass to the massive body of water. You can continue to follow the compass either by swimming or flying until you reach the ship. Climb aboard the ship. Wither Skeletons are guarding the stairs that lead down to the lower decks, where Lieutenant Koogar is located with several Mutated Pigmen. Once you have located and killed Koogar, return to /warp chapter2.