Coming from Echo Caverns, go left at first T-crossing. At next T-crossing, go right. You will curve to the right after a short while, and he was just around that corner on the right side(looking West). He is a very big Shrieker, much bigger then the Enraged Shrieker which can be found elsewhere in the Deep. Not much tougher then the rest though. Strictly melee, as far as I could tell. Loc approx: -50 (x-axis) -750 (y-axis)