[lordbosh]

If one of my evil organizations captured you, we'd enchant an illusion as if you were still on the ship, fill it with explosives, and send it back to enter the pirate shipyard. Since the shipyard is under the castle, when the entire thing blew, it would raise up the foundations of the castle and bring it crumbling into the shipyard. Destroying everything and crippling the navy.

That would be followed by a massive multi-national fleet blockaiding your island. Choking your islanders off from supplies until you surrendered.