Flint Hold

"A lonely castle stands proud, defiant towards all who wish to approach. The shadow who rules from within stares from the highest spire, their face as veiled as their intentions. You approach Flint Hold, but you will never find purchase there."
-Martha Del Statoria, Traveller and Novelist

High Walls, Secret Meetings

Flint Hold is the fortified base of operations for The Flint Guild. No normal person is able to enter, and even docking to meet with somebody requires high status, usually within the guild. While sailing past the castle generally won't cause trouble, it's advised not to sail towards it, lest you draw the ire of the guards.
Those who are let in do business with the higher-ups of The Flint Guild, allegedly over dinner and fine wine. The castle is immaculately kept and has a rich interior beyond the defences. This description only speaks to the ground floor, though, as there exist no accounts of the upper levels.

Den of Flint's Shadow

The mysterious head of The Flint Guild takes residence within the upper reaches of this castle. They speak to guests through several layers of messengers, ensuring that they don't reveal their intentions or anything about their identity. This leader, best known as Flint's Shadow, runs all operations in the castle, ensuring that every coin is counted, every weapon lethal, every guard loyal to a fault.

Location under

The Green Sea