Castle Irlingstar

Castle Irlingstar was a remote and secret prison stronghold in the Thunder Peaks on the eastern border of Cormyr, where the king put traitor nobles, murderers, and agents of Sembia and Westgate.

History
It was established by Royal Mage Vangerdahast Aeiulvana, who erected the magical wall, and survived the Spellplague.

In 1480 DR, a mysterious murder occurred inside the castle.