Accessing the gulch

To enter the Forbidden Wasteland planeshift to Karnath and go n, 4w. The first room of the Wasteland has 3 shrouded warders.

Go w,n,w,n,w,s,w to reach the wall of gristle and bone. Get the skeletal hand from the wall.

Go s,e,s,e,n. To your east is a 2x2 temple that contains a stabber and a blackjacker.

Go e,s,e to reach the altar. Pull switch to reveal a down exit to Zedek the desecrator.

Give Zedek the hand and he'll blow up the wall for you, clearing the way to Patriarchs' Gulch. He also creates a portal for you, so you don't have to walk back to the wall. The room he portals to is presumably Lloydable, so summon the anchor here to farm multiple Gulch runs.

Zedek also accepts the last remaining drop of goo. This item can be obtained by killing all the "goo" related mobs in the Forbidden Wasteland (they don't repop). The drop is tougher to get than the hand, but it's a good option if you want to move the Planar Anchor out of Karnath and still be able to easily return to the gulch later on.

Discovering the royal tomb

From the Lloydable room go d,w,s and kill the restless spirit to get the golden scarab medallion. This is a key that unlocks the unfinished tomb.

Go u,w and kill the captain of the honor guard. He spawns an olive branch on death. This is one of four tickets you need to get the key to the royal burial chamber.

Go n,e,{e} to enter the unfinished tomb. Get the broken pickaxe from the pile of stoneworking tools. Next go e,s. Give the broken pickaxe to the undead contractor before he dies. He will repair it into the well-maintained pickaxe, which is the key you need to open the ransacked tomb. On death the contractor will spawn the dusty work gloves, ticket #2 of 4.

From the contractor's room Go n,w,w,u. This room has two portals in it: the symbol of Shizaga and the symbol of Werredan. Only casters can enter Shizaga's portal, and only melee-types can enter Werredan's portal. At the end of the caster's leg there's a lever which opens up the final room of the brute's path. Here you will find the master blacksmith. He can also repair your pickaxe if you forgot to get the contractor to do it. Kill him and get the handle of a broken knife.

From the symbol room go s, enter beam, n. Inpuvultu, lord of the dead will tell you that he's looking for objects which bear the stain of evil. The knife handle is one such object. Give it to him and he'll awaken the Prince of Knives within the ransacked tomb. To get there from Inpuvultu: enter patch,w,{s},s. The prince wanders this small 3 room crypt. Killing him will yield the well-oiled leathed sheath, ticket #3. While in the ransacked tomb, get the stray chess piece from the corpse of a Karnathian temple guard in the room furthest south.

Bring the stray chess piece to Inpuvultu and he will summon the disgraced patriarch. To get to him, enter patch & go north. Upon his death you will received the evenly balanced scale, the final ticket.

Turn in all four tickets to Inpuvultu. He will open an ominous passageway. Through this portal you will find a full-safe infirmary room that contains the key to the royal burial chamber. When you're ready, go down. The door to the royal tomb will be to your north.

Facing the Patriarchs

The royal tomb is located d,w,u,{e},e,n,{n} from the Lloydable room. If you just got the key, you're already here. The Patriarchs themselves are behind another closed door 2n. The fight consists of 3 big mobs that each spawn a bigger mob upon death. If you're looking to camp, the treasury s,e from the gear room is probably your best bet.