Have a look at your map for some idea as to where we need to go next. The Judicator's tomb is right down at the very bottom of the map. Hop on Despair and ride to the south. Enter the building blocking your path here. Use the summoning circle to bring forth a Dead Lord. Send him through the gate to the left to pull the switch to lower both portcullises in this room.
Go down the right hand passage and climb the wall here. At the top use the hand hold to shimmy around the corner for a chest and keep your eye out for a Boatman's Coin nearby. Afterwards drop down to the passage below. Continue down the stairs. As you round the corner you will find a Soul Arbiter's Scroll in the corner. Grab that and continue outside.
As soon as you leave the gate, look behind and to the right to see a block we can run up to. Do so and use death grip to leap up to the handholds above. Work your way across to the left to a ledge with a chest. Look above the handhold we dropped down from to see a stone we can shoot for a Stone of Power. Drop back down to ground level.
Jump on the horse and ride down the hill. Take the first right and gallop down onto the bridge here. Follow it right to the dead end in front of you to find a Book of the Dead page and then continue off the bridge to the south.
Head on towards to the big green door and as you approach, have a look at that rocky structure to the right. Have a look behind this for a Boatman's Coin and then cruise past the big green door and continue to the very southeastern corner of The Spine, find the building you can climb. Look on the ledge to the very south east here to find a Relic of Renagoth, and then make your way to the building. Find the handholds and climb to the top. Drop down inside to grab the chest. Turn around and shoot the stone here for a Stone of Power. Make your way down to the lower exit of the tower and look out from here. You should see a Boatman’s Coin . Use death grip to grab that bad boy.
Drop down and return to the big green door. Head inside to find The Judicator's Tomb.