The Fabled Shores of Gold
The Fate of the Magpie's Wing
Whilst following clues in search of the legendary Shroudbreaker artefact to reach a mythical island made of gold, the flagship of The Pirate Lord, the Magpie's Wing, is pursued by the Burning Blade. Although they managed to offload some cargo, the Magpie's Wing is sunk near the uncharted island at N-13.
Source
Tall Tale: The Shroudbreaker
The Downfall of Rathbone
Rathbone, head of the Gold Hoarder Trading Company and living in wealth outside of the Sea of Thieves, became disillusioned with life despite his hoard of gold and treasure continuing to amass.
One day he heard about the Shores of Gold, a golden island in the Sea of Thieves and set sail alone to this place.
Eventually he found Tribute Peak and made his way through the ruins of the Ancients, finding a throne chamber filled with all sorts of gold and jewels. As he sat in the throne he became overcome by greed, and he began the arduous task of moving the treasure from the throne room and back to his ship, piling on as much as his ship could carry.
As he attempted to leave the island, he was confronted by the combined forces of Eli Slate and Mercia with a fleet of ships. They attack Rathbone and his ship sinks.
As he sunk, he attempted to collect as much of the lost loot as he could, this lust for gold fuelling and sustaining him began his transformation into the Gold Hoarder, a Skeleton Lord with a body compromised of parts of gold and precious gems. Embedded upon his skull is a ancient key used to open locks within certain siren shrines.
Briggsy didn't ask to be cursed
Briggsy discovered that an ancient relic known as the Shroudbreaker would allow her to pass through the Devil's Shroud and arrive to the fabled Shores of Gold. Using the Shroudbreaker she sailed to Tribute Peak and crashed her sloop the Homeward Dove deep inland when she arrived.
Exploring the ruins of the Shores of Gold, Briggsy discovered evidence of an Ancient Civilisation but also more recent activity. She soon came to realise the place is used by the Gold Hoarder Trading Company as she delved deeper into the cave network.
Whilst down in the tunnels, she picked up a Gold Coin that led to her becoming cursed. The Gold Hoarder promises Briggsy a cure for the Skeleton Curse if she did as he wanted, but she defies him, broke apart the gems of the Shroudbreaker and hid the relic back in its resting place.
Source
Tall Tale: The Shores of Gold
The Morningstar's Fate
Graymarrow seeks the Shores of Gold, clashing with the crew of the Morningstar which is captained by Eli Slate. After a long drawn-out chase, Graymarrow manages to catch the crew of the Morningstar and strands their souls using a curse in order to maroon the crew on Old Faithful Isle, making them unable to pass on to the Ferry of the Damned.
One member of the Morningstar crew did, however, manage to escape.
Source
Tall Tale: The Fate of the Morningstar