Keys

There are a total of 30 keys to be found within the mines of Mythrock. Of those, there are 14 Large Keys and 16 Small Keys. With one exception, all the Small Keys can be found in the same rooms as the standard chests that they open. So if you're, for instance, in The Alcoves and there's an unopened chest, then there's still a small key hidden somewhere within The Alcoves.

Spires of Agdor

None Entrance Hall

Type: Large
Location: After dispelling the Red Barrier, just enter the alcove and pluck the Large Key from the box.

Winding Stairs

Type: Small
Location: Upon reaching the Save Point, look to the left to find this key on a pedestal.

Type: Small
Location: Head down the second set of stairs. Summon Odin, then burn the tapestry to his left. Odin Vision will highlight a block that had been behind the tapestry. Approach the wall, and you should be able to spot the discolored brick. Press it, then turn right and pick up the key that was just revealed.

Type: Large
Location: Inside the hidden Chest 2.

The Cage

Type: Large
Location: Hanging on the side of the rune selector.

Type: Large
Location: Reveal the hidden Chest 4.

The Alcoves

Type: Large
Location: Head to the end of the first hallway and duck into the alcove on the right. Summon Odin and use him to spot the hidden Rune Pad on the ceiling. Zap the rune to lower the Red Barrier, then head to the far wall to find this key in a box.

Type: Small
Location: Once you reach the Save Point beyond the Blue Barriers, burn the tapestry across from Odin's perch and head down the hidden stairs. Turn right at the bottom and the key will be in the recess in the wall behind the skeleton.

Dark Halls

Type: Small
Location: After the first magic missile hallway is a chasm room with a line of pillars bisecting it. Cross the pillars, then use the mirror at the end to find the invisible key on the book.

Type: Small
Location: In the chasm room behind the illusory wall. Make your way across to the table to turn off the blue beams, then use the mirror to locate the invisible key on the book.

Type: Large
Location: In the chasm room behind the illusory wall. Make your way across to the table to turn off the blue beams, then turn back to the entrance. There are ledges to the left and the right. Make your way to the ledge on the right and find this key on the rocks.

Type: Small
Location: In the short hall leading to the exit door, summon Odin and use his eyes to spot the highlighted brick near the chest. Press the brick to reveal the key hiding in the nearby pedestal.

The Forge

Type: Small
Location: When you first arrive in this area, turn right and burn the nearby tapestry. This key can be found on the wall that was behind the tapestry.

Mine Maze

Type: Small
Location: When you first arrive in this area by climbing down the chain from the Forge, turn around so that you're facing away from the fallen dwarf statue. There's a large stone slab near the wall on your right that has the key on it.

Type: Small
Location: Near the second Save Point. Summon Odin and he'll alight on a high perch. Odin vision has him mostly staring at a wall, but as per usual we can't see the key through his eyes anyway. Face the same direction that he's facing, then turn left and look at the corner between doorways to spot this tiny key.

Type: Large
Location: Inside the hidden Chest 18

Western Mineshaft

None Blue Room

None The Prison

Type: Large
Location: Inside the hidden Chest 21

Eastern Mineshaft

Type: Small
Location: In front of the minecart are two Odin pedestals. Approach the one closest to the healing fountain, and move around to the side facing the minecart to find this key hanging on it.

The Forge (Revisited)

Type: Large
Location: Return the Green Gem to the forehead of the large dwarf statue, then pick up the key that emerges from its mouth.

Rising Stairs

Type: Large
Location: Inside the hidden Chest 23

Dungeon Cells

Type: Small
Location: On the second floor, first cell you reach from the stairs. The key will be sitting on top of the slab.

Type: Large
Location: Reach the third floor by ascending the stairs. Talimar will taunt you, and when he's done pick this up from the nearby pile of rocks.

Stone Maze

Type: Small
Location: At the Save Point, you can use Odin Vision to spot a false brick down the hallway. Press the button, then bear right at the end of the hallway and retrieve the key from the pedestal. If you just entered this area, you'll need to watch out for the invisible monster.

Type: Large
Location: Inside the hidden Chest 26.

Type: Small
Location: Solve the rune puzzle in the open snowy area. One symbol can be found on a snow covered rock near the exit (). The second rune is found past the open cavern. After dispelling the red barrier, you'll see a hanging tapestry with stitched into it. The third rune is further down the maze of halls past the second rune. Make your way past the blue barrier and navigate the two magic missile hallways. Summon Odin, then use his Odin Vision to reveal . I have no idea where to find the fourth rune, but it's . Activating the correct runes on the panel will reveal this key.

Type: Large
Location: Move through the snowy cavern and make your way past the blue barrier. Navigate the two magic missile hallways and you'll find a small alcove with a skeleton in it. Near the Odin pedestal is a barrel, which you can destroy to find the key. Note: make sure you use the Fire to break the barrel. The key tends not to spawn if you use Ice.

Type: Small
Location: Enter the underground lake room and slay the monsters. While still on the dock, turn to the left. Freeze the lake, then start walking across the ice. Along the left wall will be a barred window, and this key can be found nestled between some bars.

Type: Large
Location: Inside the hidden Chest 30

Type: Large
Location: Cross the underground lake and continue on until you pass a blue barrier. Destroy the illusory wall near the second blue barrier, and find this in the alcove on the right near a Red Potion.

Dragon Cavern

Type: Small
Location: Enter the room and step onto the Save Point.. Look to the pedestal to your left that Odin has alighted on, and you can spot this key hanging from it.
The PSVR2 version moves this key to the other side of the pedestal.