This guide shows the complete walkthrough of the Deathtouched Catacombs in Elden Ring. This dungeon is on the north portion of Limgrave.
How to reach Deathtouched Catacombs
Deathtouched Catacombs is on the north portion of Limgrave. The entrance of the cave is marked in the pictures below. To reach the cave entrance, take the path west from the Saintsbridge Site of Grace. Then jump on the rocks to climb up and reach the dungeon entrance. The path to reach the entrance is marked with a red arrow in the picture below.
Deathtouched Catacombs Walkthrough
After entering the catacomb, climb down the stairs. This will lead you to the Boss Door, which will be closed now. You will need to pull a lever to open the door.
From the boss door, go down the stairs on the left. You will find skeletons here. It might be easier if you run from them instead of fighting them as they are pretty slow. Also, they can be killed only with holy weapons. If you kill them with other weapons, then they respawn. Before respawning, they emit blue light. You can hit the skeletons when it is emitting blue light, then it won’t respawn.
After coming down the stairs, you will see two paths as shown below.
Path 1: Go straight ahead and it will lead to the lever. You will find a Grave Glovewort  on the path.
Path 2: After coming down the stairs, turn around. You will find a Grave Glovewort  underneath the stairs. Then go through the tunnel on the left side. In the next room, you will find another Grave Glovewort . Now go through the tunnel on the left side of this room. After coming out, you will find an Uchigatana near the ledge as shown in the second picture below. Then jump down and go straight ahead to reach the lever.
Pull the lever to open the boss door. Now trace your path back and go to the Boss’s Lair. Defeat the Black Knife Assassin boss to get Assassin’s Crimson dagger. Open the chest inside the Boss’s room to get a Deathroot.