How to unlock the Water Seal in Fields of Mistria

Further up the Mines of Mistria, on the 20th floor, he will encounter the exact formidability known as the Water Seal. Giving the required items will gain one passage beyond this barrier. There is an enigmatic challenge introduced to adventurers by an echoing voice throughout the depths of the Mines guiding him toward the Water Seal and its demanding requirements.

How to Open the Water Seal Door in Mistria Fields

You'll have to collect four special items: the Ruby, the Lantern Moth, the Stone Loach, and the Upper Mines Mushroom. Worry not if you have no idea where these things are; I charted down where to find all of them. For the best chance of getting everything, though, the best thing to do is visit the Mines from top to bottom.

How to get Rubies y How to get a Lantern Moth

Rubies are quite a common find when exploring your Mines, most of them located within red-colored rock formations. If you run out of luck, you can try checking Balor's Wagon. He will sometimes have Rubies on sale for 180 Tesserae each.

You can find the Lantern Moth fluttering around in the upper levels of the Mines, near the pedestals with fire, usually before floor 20.

How to get a Stone Loach

The Stone Loach can be a little bit of a pain to track down, but isn't actually the rarest thing in the Upper Mines. These large shadowy creatures lounge around in the various pools that dot the area. You'll probably find a ton of Cave Eels before you ever find a Stone Loach, but just keep searching and you'll run into one eventually.

How to Get an Upper Mines Mushroom

The most elusive thing in the huge Mistria Mines turns out to be theUpper Mines Mushroom. This mushroom grows on the 17th floor, after the most exhaustive search. Now, after you have managed to get all four items—a Ruby, a Lantern Moth, Stone Loach, and an Upper Mines Mushroom—back on floor 20, activate the stone tablet in the center. This is an ancient mechanism, very much akin to a donation box. Placing the items on pedestals of their kind will open the door with the Water Seal.

What do you get for opening the Water Seal in Fields of Mistria?

Breaking the Water Seal opens an underwater section of the Mines. This makes for much more underwater enemies, new resources that include coral, sapphire, and iron ore. Iron Ore becomes especially very instrumental for upgrading equipment and the General Store, key for more exploration. When you come back from this underwater jaunt, Caldarus will show you a roadmap for your descent, mentioning five seals in total, which correspond very likely with every 20 levels in the Mines.

With this information, you'll receive a new spell, 'Summon Rain,' which fittingly waters your entire crop field. Your Mana pool will go up by one, and Caldarus will fully restore your health and Mana.