The Undercrofts

The Undercrofts is a level in Wrath: Aeon of Ruin, accessible from the Mourningvale hub. The level is a large graveyard covered in snow with catacombs running far beneath. It contains 13 secrets and 3 shrines.

Walkthrough
From the start, the level is a simple series of catacombs with little to no deviation. The Coach Gun can be found in a large circular room, and collecting it will cause Fallen (or Widows on later playthroughs) to break out of their coffins. Afterwards, head up some stairs to to find the Shotgun waiting for you, again triggering a trap. After some more catacombs, you'll find the surface filled with enemies. To continue, look for a doorway on the cliffside and head on through to collect the Fang Spitter and find the first shrine. After the first shrine, a large building can be seen and nearby a lava river bisects some graves. Those graves contain the blue key, and they are guarded by either Wretches or Oppressors depending on when you play the level. The blue door is located inside the building and it leads to another graveyard filled with enemies. Continue foreword to find the second shrine. A teleporter to the blue key area is now active.

The goal now is to get the red key and head through the red key door. From the door, turn around and head into a catacomb filled with ambushing Widows. Flip the switch and continue into an underground graveyard filled with Stricken. Survival will net you the Retcher and shortly afterwards you'll find the red key in a large arena. Pick it up and take a side passage back up to the surface, now crawling with foes. Through the red door a staircase down can be created which leads to the final shrine. Outside there is a bridge over lava leading to a large structure. Climb the structure to the top and pick up the relic. The portal back will spawn, as well as one final Stricken.

Secrets

 * 1) Before the Coach Gun room, a coffin can be destroyed to find a small alcove containing armor.
 * 2) Before the Shotgun but after climbing the stairs, a ledge can be jumped on to reveal a small walkable ledge.
 * 3) After picking up the Shotgun, an elevator takes you to a room of enemies. Use the elevator but then jump off. The floor underneath can be destroyed to find a secret area.
 * 4) Before leaving the previous secret, destroy a nearby wall to reveal a switch which holds dark armor.
 * 5) On the way to the surface, a Life Siphon can be seen above a statue. On the surface, a knocked-over pillar can be climbed on to reveal a window where the artifact can be collected with a precise landing.
 * 6) Facing the broken pillar from the previous secret, turn around to find some stairs. To the right is a ledge that can be jumped on to get dark armor.
 * 7) In the first outdoor area, the same one containing the previous secrets, a large side area can be explored. One of the structures down here resembles the one from secret 5. Like that secret, you can jump inside, this time finding more dark armor.
 * 8) Before crossing the bridge to get the blue key, look to you left and find a destructible wall.
 * 9) At the blue door, climb up to the upper balcony and find a destructible wall to boost jump through.
 * 10) A coffer key is accessible by using the Ruination Blade to boost jump to it from the nearby balconies. The chest is on the same upper balcony as the previous secret.
 * 11) Before the second shrine, a switch can be found on a one of the ledge gravestones. This opens a nearby building with armor.
 * 12) Right after the second shrine is a Cruel Aegis to can be jumped to.
 * 13) At the final structure, a thin ledge can be accessed by either jumping to it or falling on it. At the far end, a boost jump can be preformed to collect some dark armor.