The Demon in the Dark

You'll start this mission by heading to the middle of the area. Look for a lever and pull it. This will open up a door for you. After that, grab Wren's head – yeah, it's a bit morbid, I know – and head into the mine. Your goal here is to reattach her head to her body.

Once Wren is reassembled, follow her deeper into the mine. Keep an eye out for any enemies along the way. You'll eventually reach a large room with several rings scattered around. Wait for Wren to try and pinpoint her friend, Alkonost. When she does, make your way up to the platform on the left side of the room. You'll see some... well, poop. Melee it to free Lark.

After Lark explains what he and his team found, you'll need to open the next door. To do this, you'll need to step on three different square platforms around the room. Each platform will activate a set of circles. You need to shoot through these circles in order to unlock the door. It sounds a bit tricky, but just focus on hitting the targets.

With the door open, push further into the mine. Clear out any enemies you encounter until you reach the waypoint marked on your map. This is where you'll find the signal. Once you enter the room, pick up the ECHO log on the floor and listen to what it has to say. After that, grab Alkonost's Arm, which should be on the right side of the room. Before you leave this area, make sure to check the back wall for Eridian Writing and loot the White Chest in the middle of the room.

Now, exit the room and take a left. Head towards a locked door. Don't worry, it'll open as you get close. As soon as it opens, be ready for a few Varkids to jump out. Take them down, and then walk towards the middle of the room. This will trigger the appearance of Lagromar.

It's time to deal with Lagromar. He's not the toughest boss, but it's a good idea to clear out any remaining enemies in the area before you focus on him. Keep your distance during the fight and don't forget to use your Action Skills and grenades to speed things up. Once Lagromar is down, collect Alkonost's Head from the floor.

Head through the door that just opened up. You'll find some chests along the way, so loot them if you want. Your final objective is to return Alkonost's Head and Arm back to Wren. Doing this will complete the mission!