Dwarven Sphere

Found in remains of Nel Kuldohr this relic of ancient Dwarvish design was found by the sorcerer Fogel of the Kissed Pixie.
=== Researched by Fogel ===
A casting coalition of bronze and gold, this Dwarvish relic shines with an energy within though locked away by some combination of abjuration magic and clockwork artificer design. Attempts to pierce and break through the metal would find no joy, but closer inspection of the runes seem to protect further magic within, without doubt a conjuration magic could be cast if the it were unlocked.
Reading the inscription upon, deciphering the ancient Dwarven runes it was uncovered to be a riddle of sorts.
Halo of water, tongue of wood, skin of stone and long I’ve stood. My fingers short reach to the sky, inside my heart men live and die.
A Castle.
As the words were spoken, the sphere unravelled as the sound of a mechanical clock whirred, unwrapping itself as stone lined with bronze broke free from the sphere in the basement of the Kissed Pixie. Stone towers shot up, breaking through the main floor of the tavern, sending splinters of wood flying in all directions until four turret towers erupted from the room and from the outside it passer bys screamed in horror as an instant fortress erupted in the middle of the tavern. 20 feet on a side and 30 feet high with arrow slits on all sides and a battlement atop it.
The repairs needed would not be cheap, but a magical item that could summon a dwarven fortress in an instant had been discovered.