Chestacean Morph in Throne & Liberty To unlock the Chestacean morph, complete the fourth objective in the A Sailor's Latter quest in the Windhill Shores Exploration Codex: Read the Letter in a Bottle near the wreck under Spiral Cliff Find the Stranded Sailor who wrote this latter by boarding the Marind that regularly docks at Kastleton Port or by swimming Read the letter near the Stranded Sailor Examine the Shipwreck Treasure Chest near the shipwreck