Caverns

First things first, head into the entrance room and take the stairs down to the next floor. Once you're down there, just keep heading down the main path. Don't bother with the paths to your right or left; they're just dead ends. Keep going until the path widens a bit, then it'll narrow again as it turns down and to the lower left. Follow that, and you'll pop out into a big cavern area.

Now, you've got a couple of options. For now, let's go left and up. This will lead you into another cave. Your goal here is to cross this cave, heading generally left and up, until you find another hole that goes down to the next level.

Walk down this cave, but whatever you do, don't go left! That path leads to a dead end on a ledge, and while you get a nice view, it's not where we need to go. Instead, keep walking down. You'll find a treasure chest here containing a SEED OF MAGIC. Grab it, then head back up the stairs to the big cavern area we were in before.

This time, when you're back in the large cavern, head down. Ignore those short side passages you see; they're not important. Just keep following the path as it curves to the left and then up. You'll spot a treasure chest on a ledge to your right. Open it up to snag an IRON HELMET. After that, keep going up and around to the right. You'll find a long ladder leading down.

Climb down that ladder. On this next level, head left and go down another ladder. You'll walk right for a bit, crossing a bridge. You'll get a pretty good look at an intimidating door from here, but don't worry about it yet. Keep going and climb down a short ladder.

Once you're down, walk up and around the back of the ladder rock. You'll find a treasure chest tucked away up a short path. Inside, you'll find some MAGIC WATER. Now, backtrack to the ladder and take the only path available, which curves left and up. This will lead you into a cave opening.

There's only one way to go from here! Follow the path, and you'll eventually emerge onto a red carpet, right in front of the large doors.

Go ahead and enter those doors. Apnea will pop in to remind you that Murdaw is a tricky opponent and will give Hero Ra's Mirror. You're almost there!