Pact of the Ancients
Black Thunder Vaults
One the deepest mines high in the Valthune Mountains, Black Thunder Vaults, is now abandoned. It is said that umber hulks from the Underdark tunneled into the lower shafts letting other dark denizens access to its halls. The townsfolk now live in fear that the foul beasts of the Underdark might one day take an interest in the dealings of the surface world.