Gael Tunnel

Gael Tunnel is a mine that connects Caelid with Limgrave, though the door on the Limgrave side is locked from the inside. Radahn’s soldiers patrol it, and land octopuses lurk in the water.

The boss is a Magma Wyrm, and the reward is one of the most famous early weapons in the game: Moonveil, a katana that fires a beam of glintstone with its skill. A Dragon Heart and a good haul of upgrade materials come with it.