Akamu was already posted.
Type: Unique Treasure
Ability: Remove one positive Unique Treasure (of your choice) on this island from the game before applying its effects. This ship may dock at an opponent’s home island or fort; while there, you may exchange this treasure for one treasure there of your choosing.
Flavor text: Some sailors claim to have found a chest without a key to open it, and either abandon it or destroy it in a rage. However, some have realized that bluffing that it’s a real key could be the key to real wealth.
Historical Custom of the Day #320
Faction Affiliation: English
Point Value: 7
Number of Masts: 2
Cargo Space: 3
Base Move: S+L
Ability: This ship gets +1 to her d6 rolls against sea creatures.
Link: George Bass
You can find my custom sets here: Pirates of the Age of Sail and Pirates of the Epic Seas