This level takes place in the legendary underbelly of the seemingly peaceful town of Blackmarsh. Watch out for the new monster, the Fallen Angel. It culminates with the final standoff with Eidolon in his lair. Begin at he Cathedral and read the sign. Go left, down a hall, and past the barred door. Descend some steps and enter the storage room. Break a crate in the back to reveal a passage. Crouch into the passage and drop down to some bars. Step on one of the bars to break it and fall down into the water. Go to the coffin, find the hidden button, and press it. This opens a tunnel off to the right. Jump up, crouch through, and drop back into the water. Open the door and go through the teleporter to Tyranith's bedroom. Find the book and read it. Turn around and head into the other room with the pool of holy water. Enter the door and follow the hall to the right until you reach your original starting point. Enter the doorway leading to the Tower of the Dark Mage. Turn left and proceed down the hall to the spiral stairs. Climb up the stairs to the second door on the left. Enter the door and come to a pit with an imp statue. Break the planks on the left and find the gear. Hit the gear to move a bridge over the pit and run across it. Head upstairs over to the left. Go up a ramp, through the door, and up another ramp. Go across the room, up yet another ramp, and into the Shadow Wizard's bedroom. Break the dragon mural on the wall and get the Gold Sphere. Return to the spiral stairs. Hit the button and the bridge will extend again. Head down and take the door on the right leading to a courtyard. Climb up the rampart to a room. Find the note on the bench about the golden lions and the dark mage. Break the tapestry bearing the golden lion to reveal a secret passage. Follow the secret passage to the elevator and take it up to the Dark Mage's Laboratory. Kill him and take the sheet music from the table. Crouch and head over behind the chair and put the sphere between the two prongs. Stand on the teleporter between two metal balls in the laboratory. At the outdoor arena, kill the golem to open up the exit. Enter it and continue down the hall to the statue. Break the front left corner of the base of the statue. Grab the Ring of Flying, activate it, and fly up to snatch the Mage's Tome. Fly through the red teleporter to return to the spiral stairs.

Find your way back to the door leading to the Cathedral and enter. Head left up the stairs until you reach the room with the stained glass and the organ. Go up to the organ to play the music. A doorway will open up on the other side of the stained glass. Smash the glass and go through. Follow the corridor up into a bell tower. Go under the bell to a room containing Tyranith's body. Slowly go through the teleporter and grab the Defiled Holy Relic next to you on the ledge. Jump down, turn around, and pass through the teleporter. Go left and then right at the message (that you read at the beginning). Go back to the room with the holy water basin. Approach the basin to clean the Holy Cross. Grab it and go back to the teleporter. Enter it and go up to the defiled altar to open up a secret passage. Jump down to the passage under the altar. Go through the passage to a room with a hole in the floor. Smash the wall to the right and grab power-ups. Go back to the room with the hole and jump down to a room with a teleporter. Go up to the mural and wait for it to open. Travel down the passage to the sewer and turn left at the fork. Proceed down the hall and take your first left to the Underhalls entrance. Go into the entrance and continue down the hall and the steps. Go right at the three-way intersection and arrive at the room with the stream and the tube. Climb down the stairs to the left and jump into the stream. Follow the stream to a room with tubes on the walls. Go up the stairs at the end and turn the wheel. This opens up the second tube on the left. Go through and drop down into another different room. Spin the wheel on the left wall, opening up the large tube back in the room with the stream. Pass through the arch on the left and continue onward until you reach the lava. Go to the top by ascending the spiral ramp that goes around the lava pit. Go down the hall to a wooden door. Open the door onto a room with three exits. Put the Mage's Tome onto the pedestal at the center. This action opens up the mural and reveals a set of doors. Go down the hallway with the Tome of Power, and when you get to the end, hit the wall on the left to open a secret passage. Climb the stairs and go out into the hall and turn left. Return to the room with the stream.

Jump into the newly opened tube and follow it to a room. Go up the stairs to the left and jump across to the ledge on the other side. Get the Prybar. Jump back across and follow the passage back to the Dark Mage's Tower. Return to the Mage's Laboratory and pry the jammed door open. Collect power-ups and then return to where you picked up the Prybar. Descend the stairs and go left. Follow the tube then drop into some water and turn the wheel on the wall. Grab the Icon of the Defender. Go up through the hole on the right, near the Icon of the Defender. Enter the torture chamber and open the door on the left. Enter the cell and approach the right wall. It will crumble, and in the other cell, there will be a help message scrawled upon the wall. Shoot at the wall and retrieve a Krater of Might. Go up the stairs and return to the area where you left the Mage's Tome. Go through the doors to Eidolon's Ordeal. Turn right and continue until you come to a room with stained glass windows. Break the window in front of you and head up the stairs. Continue straight at the three exits and you'll arrive at a room with stairs leading to a balcony. Ascend the stairs and hit the first switch, opening up two doors below. Drop down and go through the right door. Hit the second switch, head back up to the balcony, and go up the stairs to the right. Leap across to the small platform and enter the door. Follow the steps into a room with a spiral staircase. Jump down, hit the third switch, and drop down with the floor. Defeat the spiders and climb up the spiral stairs to the top. Hit a button to trigger a platform outside. Now walk off the edge and return to the main room. Carefully jump across the two pillars at each side of it and then across to the small platform on the wall. Go down the hall to a room with a tightrope extended over some lava. Run across the rope and trigger the fourth switch. Go back across the rope and return to the small platform. Now jump over to the ledge on the left, go around and upstairs, and come to a room with a box. Hit the fifth switch and the box will lower. Take it down and turn around until you're facing the sixth switch. Jump over and activate it, thus completing the ordeal. Go back over the bridge and return to the three-way intersection. Go left and to a room with lava and stairs to the right. Follow the stairs up to the small balcony. Drop down to the lower ledge below the balcony. Activate the switch in the alcove. Go up the bridge and activate another switch, opening a door at the top of the steps. Enter the door and proceed up the stairs on the left. Open the bars and go to the room with the pool of lava. Walk around the ledge running along the perimeter of the pool. Hit the switch, jump onto the platform in the lava, and take it up. Go down the hall until you get to the bars. Open the bars and jump across to get the Soul Key. Jump down and find the entrance to Eidolon's Lair. Enter and confront Eidolon. Good Luck!