Winding Stairs
Items in this room:
Gold Coins: 6 | Keys: 3 | Potions: 2 | Gems: 0
Once in the room, look at the pedestal on the left and pick up the Small Key sitting on top. Head down the stairs to the first landing, and look to the right to find some destructible pots and crates. Break them to find two clusters of Gold Coins. Turn around and walk to the other end of the landing. Across from the red barriers is a chest, which can be opened with the Small Key picked up earlier to find more Gold Coins.
Now to deal with the red barriers. Face the barrier blocking the next set of stairs, then look to the right to spot a Runic Plate on the wall. Shoot that, and the first barrier will fall. Move down the stairs a bit until you're in front of the next barrier. Turn around and look up the stairs. There's a column in your field of view, and at the top of that column is another Runic Plate. Zap this one with fire to switch which barriers are active, which gives us access to the rest of the stairs leading to the second landing.
When you hit the landing you'll be attacked by two Spiders, so be on your guard.
Hard Mode
In Hard mode, you will also be attacked by a Medium Spider, so be prepared to dodge its webs
Once more break all the pots and crates to find two clusters of Gold Coins. Burn the hanging tapestries and then summon Odin to the nearby pedestal. Use Odin Vision to look around to spot a couple neat things. The first is the hidden chest immediately in view upon first gazing through his eye. But there's far more to see here! Well, one more thing to see here, but it's fairly important if you're trying to find everything. Look to the left and you'll be able to see (if you burned the tapestry) a square block highlighted in red.
Exit Odin Vision and approach the area the red square was. You should be able to spot a square brick that is darker in color than the rest of the wall, and jutting out slightly. Use a finger to press this brick, then look to your right to see that the top of a pedestal has raised up. Pick up the Small Key that was revealed, then head back to where Odin had revealed the hidden chest. Shoot in that area until you uncover it, then grab the Large Key that was inside.
This will place you right next to the red barriers blocking the next set of steps. Before we deal with those, move past the barrier and pick up the Blue Potion from the fancy shelf. Stay there, but turn so you're facing the pedestal that had the Small Key in it. Blast the Runic Plate on the wall above it, then look up at the ceiling. At the spot roughly in the middle of the ceiling is another Runic Plate that will need activated.
Now that the stairway is safe head on down. At the foot of the stairs, look up and shoot the Runic Plate to clear the next barrier. Once you move forward into the open area with the Message Sphere, there's another Runic Plate on the ceiling which will deactivate all the red barriers in case you missed anything. Listen to the missive left behind for Hedrog if you wish. Open up the chest in here for a Red Potion, and break the barrel near the exit for the final set of Gold Coins in this room. Now just unlock the exit door and head into the next room.
