Two Skeleton archers will await you when you enter the Catacombs. There is another Grave Glovewort on the right side, and a Ghost Glovewort straight ahead. The Skeletons stand behind the pillars; you can take them out or avoid them entirely by dodging the arrows. If you want to kill them, use the pillars to your advantage and take them on individually.
As you leave this room, a Skeleton warrior will stand in your way, holding a Grossmesser. You can fight them or dash past to enter the tunnel on the right with the flaming statue. Avoid the flame as it deals out a lot of damage. It will breathe down the tunnel at short intervals. You can avoid it by dodging into the small room on the right side of the passage.
Time yourself, and collect the Human Bone Shards in the middle of the tunnel. Sprint for the room with the statue before it starts firing away again. It’s a very short interval, but you can make it right if you time it right. Shooting at the statue will cause it to descend, but it can be tricky. Once you are in the room, you can hit it with a melee weapon to get it to stop. Collect the Grave Violet in the corner of this room, avoiding the Skeleton that rises from the ground.
Moving to the next room, you can pick up another Grave Glovewort from the ground. Four Skeleton enemies will rise from the grounds, and you must fight them. Once you have cleared the room, you can pick up the tool Prattling Pate. “Thank you.” You can also try to escape quickly by running back to the descended statue and jumping on top of it.
After you have jumped onto the statue, it will ascend to the second floor. Watch out for the Skeleton with a fire pot on the left side of the platform you will be jumping on. Run through the passage and pick up the Grave Violet on the left. In the next room, you will find a Grave Glovewort. A Skeleton archer will guard it.
Make your way to the golden statue where there is another Grave Violet. A Skeleton will lash out at you with a Grossmesser, and you need to kill it. There is a lever at the statue that you need to pull. This opens the locked doors at the beginning of the Catacombs. You can quickly jump off the platform and run up the stairs to avoid the Skeleton archers that will spawn.
Tombsward Catacombs Boss Battle: Cemetery Shade

You can rest at the Site of Grace if needed, at the beginning of the Catacombs. Otherwise, the door to the boss battle is on the right side. You will need to walk into the golden mist to reach the battle arena of the Cemetery Shade. They can teleport short distances and attack you with Bloodhound Fang, which has Bleed effect. As for their ranged attacks, they throw green orbs of poison. You can block this attack with the pillars in the room.
The Cemetery Shade does not pose any real threat, as they have only 800 health, and you can kill them quickly with a high-damage dealing melee weapon. You can also use arrows to shoot them from a distance. Once you have beaten the boss, you will get 2200 runes and Lhutel the Headless, a legendary Spirit Ash.