You reach an impossibly dense pitch-black void, and realize that this place is where all of reality - all that is and all that ever will be - ends. In its center, you see a minuscule rift, suspended just out of reach. Somehow, you've reached the other side of the gateway above Sentinel Hill.
Just then, a voice from the darkness beyond calls to you. "Git out." The wisp of light you've been following flits into the darkness. Moments later, the warped, twisted face of Seth Bishop emerges. His skin crawls with an unnatural mutation. His eyes are wide, filled with a wicked malice. "Git out! I am his vessel now! I'ave the knowledge of the elders! Now, leave… or die!" He cackles madly as his enthralled, misshapen body limps forward
You must find a way to close the rift for good, but first you must deal with Seth - that is, with the creature he has become.