Drop down, and find the torch located at the back of the room. Pick up the torch, and ignite it on the open flame nearby. The room will begin to fill with blood. Floating platforms will begin to rise up from the ground. Glide across to each platform, until you reach the cauldron with the wood in it. Ignite it, and the Light Reaver font and three Air Reaver plints will emerge. Swim across to it and use it. Now, use the Light Reaver to shoot the large, pink crystal on the ceiling. This will drain the blood. Drop down, and use the Air Reaver font on the ground, before the blood drains back into the room. Now, when the room refills, pick any of the three Air Reaver altars, and thrust the Air Reaver into it the best choice is the one farthest from the flame you lit. After a scene, there will be three pillars with updrifts on them, at different heights. Use them to glide up to the next fire pot, and pick up a torch on the left or right side of it. Now, glide back down on the air streams if you touch the blood at any time, you will lose the torch. Ignite the torch on the flame at the end of the pillars, and glide back up. Now, ignite the fire pot. Now, if you want, you can swim all the way across the room. You can now reach the Fire Forge, but it's not yet active. To the right side of the Fire Forge is a save point, I suggest you use it since it's been awhile since you've been able to save. anyway, head to the opposite side of the room the end with the fire pot, and make sure you have the Light Reaver. Shoot the large pink crystal in the ceiling to drain the blood, and then quickly grab a torch and ignite it. Use the updrifts to glide all the way across the room, and land in front of the Fire Forge. Walk up to the center of the Fire Forge a raised, round circle and use the lit torch to ignite it. This will activate the Fire Forge. Plunge the Soul Reaver into the Forge, and, after a scene, you'll have the Fire Reaver, and an even larger health spiral. If you have not yet saved,it would be a good time to. Now, head down the hallway to the left of the Fire Forge, and use the Fire Reaver to open the door. There will be a scene in which you will see the Heart of Darkness ripped from Janos Audron, and Raziel will see his human self, which will in turn see his Soul Reaver form.