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When you first get to The Kar’Thul Marshes inDoom: The Dark Ages, you’ll notice how odd the level is. This illusion-filled world has tons of open spaces, which could make locating all the collectibles and secrets easy to find. However, since the marshes aren’t what they appear to be at times, you’ll probably miss out on one or two collectibles.
You’ll also be hit with some mind-boggling puzzles for a shooter. Additionally, to get everything in this level, you must complete certain prerequisites first. So, even though there’s a lot of space on this map, how it’s laid out will make things more difficult. To have an easier time finding all the collectibles, consider using this guide.

All Secrets And Collectibles
The goal of this mission is to gettwo relic fragmentsthat will createa Relic Key; this is fairly straightforward - it’ll be the collectibles that give you a hard time.
Mission Challenges
Hunter
You need to find andbreak five Wolf Statues. Doing this challenge is one of the most important aspects of the level. If you don’t get all five,you won’t be able to get the Wraithstone. When you complete this challenge, you’ll earnthe Reverent skin for the Super Shotgun.
Roundup
Use theBTC to slay 20 or more demons with a single shot. Sadly, there are only a few times when a large swarm of enemies spawns on you, so this challenge may be the harder of the two. Completing this gives you about100 gold.
Codex
When you start the level and get to the large open space, look to your right. You should see a path witharmor pick-ups on the ground. Head up the path,but don’t go all the way.
As you reach the mid-section of the path,turn to your left, and there will be ahole in the wallwhere you can throw your shield. When that’s done,turn around and go back to the starting area.

Enemies will spawn; however, make sure youdon’t use the shield and keep it in the shield trigger point. If you take out the shield,enemies will disappear, forcing you to do it all over again.
Once that’s done, and you’re in the starting area,walk along the wall on the left. You should seea door with a pile of goldbehind it. Walk up to the door, and it should open.

verify the shield is still in the trigger point, otherwise, the door won’t open.
After you get the gold, you cankeep walking straightto acquire the Codex.

Demonic Ammo Essence
Once you exit the cave,head back towards that same path with the armor pick-ups. When you go across, look to yourleft to see health jarsleading to the top of a platform. Follow this path, and you’ll find a few more gold pieces with a medium armor pick-up at the end.
Afterwards, turn around, jump down, and head straight from the platform you were just on. If you make it far enough, there should be alarge circular door on the right. Walk up to it and enter.

You will reach a narrow corridor that goes in a circular route. However,only walk for a few stepsas the corridornever ends. When you’ve made some progress,turn aroundand keep following thecorridor backwards. After a short walk, you’ll finda Gold Chest in an opening.
When you grab the chest,the door behind it will open, taking you back to the entrance.

Now, ahead of you, there will be a rock formation.Go slightly leftof it till you see a red barrier. Walk up to it,and turn right.Look up, and you’ll see another shield trigger point.
Headback towards the entrancewith the Gold Chest, andturn leftonto a climbable wall. There will be a jump pad in front of it as well.Head up to the platformand collect all the gold pieces. You’ll alsofind BFC ammoat the end of the path.

Once that’s done,jump down and walk straight from the platform. Follow the path hugging the red barriers, and you’ll be in a large open space. Here is one of the spots where you canattempt the Roundupchallenge.
Lure the enemies to the back of the section since there’s a small pocket where you can group them and easily get the challenge.

As you’re fighting enemies, you’ll also need to dealwith the Leaderenemy, who drops the ammo essence. Once you get the ammo enhancements,follow the story markerto interact with theblack ball. This gives you thefirst key fragment.
Life Sigil
At the black ball,head towards the story marker. However, takethe rightmost pathand continue following it. At the end, you’ll reach a cliffto look from. While staying on the ledge,turn right; there will be gold with a Life Sigil nearby.
Drop down and collect them all.

Wolf Statue 1
From where the Life Sigil is,drop into the shallow canyon. Directly acrossfrom the ledgewill be a pile of gold to collect. However, when you take it, aWhiplash and several smaller enemies spawn.
By hugging the wall where you saw the pile of gold,go righttill you reach the other side. There will be a ledge with a gate that can be openedwith the shield dashjust beyond it.Climb upthe wall andfight off the enemies.

Afterward, collect the gold in front of the gateand then shield dash through it.
When you make it past the gate, a large structure will be in front of you.On the left, you should see aSentinel Shrineas well.
If you walk to the shrine andturn in the opposite directionfrom it, you can see thefirst Wolf Statuein the distance. For the Wolf Statue to count,you must break it by throwing your shieldat the statue. Once that’s done, you get the first wolf.
Ruby
By lookingbehind the statue, you will see anarea to drop into. When you land, collect all the gold andthen turn around. By doing this, there will be anentrance to walk into. As you enter, you’ll find astatue on the other sideof the room.
Walk up to it, andyou’ll get teleported into a large roomwith a monolith in one corner and an eye in the other. Between them will be a pool of water.
Dive into the pool of waterand swim down to get out.You’ll go back to the same room you were just in, only this time, you’ll end upon top of a large cubestructure, which was initiallyabove you.
When you land, you’ll see the ruby in front.Walk towards the corner, and look down. Launch your shieldat the Superheated Metal point toopen up a gatethat’s blocking an eye.
Once that’s done,drop and head to the monolithto line up the eye with the large eye you just unlocked. The gate with the ruby should open.Jump into the waterand exit the same way you did before.
Upon landing on the block,run and jump acrossto obtain the ruby. Once that’s done, agateway leading outwill open upbehind the statueholding the ruby.
Toy
Now that you’re back outside and at the entrance,follow the path upwardstill you reach an opening with aclimbable wall on the right. Go up those walls. Be very careful when you reach the top,there will be a Mancubuswaiting for you.
After you beat it, you’ll see aswitch on the ground to walk on. As you walk on the switch,directly in front, a Superheated Metal latch will appear.Throw your shieldat it.
Drop to the area below andhead left. In themiddle of the wall, you’ll find anopening that has a large question markin it.
Walk into it, and you’ll collect the Battle Knight Toy.
Wolf Statue 2
When you collect the toy,a real armored Battle Knight will spawn. After you beat it,walk straightfrom where the question mark was. You should be able tosee a pile of gold.
Just behind the pile,when you look down, there will be another statue. Drop and then break it. You can go back up using theclimbable walls behind you.
Wolf Statue 3
Afteryou reach the top, head left. By moving in that direction, you’ll find some gold pick-upsleading to an entrance. There will also be enemieson the left. For the time being,ignore them.
Follow thepath with gold pick-upstill you reach a ledgeoverlooking a small room. In the small room, you’ll find aninaccessible Wraithstone with five Wolf Statuesaround it. Three of them are covered in red,while two should be grayed out.
This is becauseyou’ve broken two so far. Drop into the room and collect the sole piece of gold. Next,turn around and enter the tunnelwith more gold pieces.
At the end, you’ll find thethird Wolf Statuethat can be broken down.
Demonic Armor Essence
Now, head back the way you came from byclimbing up the wall. Make your way back towhere those enemies are. Again,you must deal with a Leaderbefore getting the armor boost.
Once that’s done, thesecond black ball becomes available. If you still need to complete the Roundup challenge,now would be a good timeto attempt it. When the area is clear,interact with the black ballto obtain thesecond key fragment.
Wolf Statue 4
From the black ball,turn around and walk straight. You’ll go betweentwo rock formations. When you do,make a left right after you pass them.By walking a little straight, you’ll see a gold pileon the right. As you turn around, you can also find afew health jars near a ledge.
Walk up to the ledge. By lookingto the left, you’re able to find thefourth Wolf Statue. Again,throw your shieldat it to break it.
Wolf Statue 5
Head back towards the pile of goldyou just picked up. Follow the path towardsanother entrance that has more gold pick-ups in front of it. However, take care of thelarge tentacle monstersbefore you go in.
Afterward, make your way to the large entrance. Once inside,follow the path going left. You’ll end up in a room that is rotating. There will also be a shield triggerat the end of the platformyou’re on.
Wait for the room to stop rotating.Then,throw your shield at the trigger point. This will cause the room to shift again. After it moves, ensure there is a blockthat you can easily jump onto.
you’re able to use the image above to see what the layout of the room should be after you’ve moved it.
While on the block,turn around, and again,throw the shield at the trigger point. This will cause the room to move another time. When the room moves,balance yourself on the blockbecause you willfall offif you don’t move around.
Now, you should beon the top right wallafter the room stops rotating. From here,turn around. You’ll find a point tothrow your shieldand jump to.Leap across the gap, and you’ll landnext to a Gold Chest. Interact with the chest, and theopening behind itlets you out.
Once outside,walk directly from the entrance. you may find thelast Wolf Statuein front of a wall.
However, deal with any enemies along the way.
Wraithstone
To get the last collectible,make sure you have all the wolves broken down first. Assuming that’s done,head towards the story markerto the large structure. When you’re in front of it,walk in the opposite direction.
You’ll end up on an elevated platform.Drop the ledge and turn immediately around. As you walk on the platform, you’ll enter the areawith the Wraithstone and five wolves, all of which should be gray by now.
Now,the Wraithstone is finally accessible. Once you have it, head back to the story markerto finish the level.
However, there will be one last wave of enemies at the very end of the level. Again, if you don’t have the Roundup challenge, this is the last time to do so. But if you don’t get it, simply retry the level.