First Appearance: WB2014 Duke Forecastle - Part 6
A double eagle is a type of wildlife that will occasionally be sighted at sea. They have two heads and are capable of capturing a single unit. They will occasionally use this special to eat men, and it is also possible for them to fish people out of the sea. According to Hashtag’s Guide to Water-Capables, they sometimes perch on ships to carry them into new territory. It is possible to tame them.
Seafarers are particularly superstitious about these creatures. They believe them to bring Luckamancy, both good and bad, but mostly bad. If one lands on your ship, it is said to guarantee that not all will make it home. If one lands on a ship's maiden voyage, then it will take at least a thousand turns to reach home, if ever. If it lands on a milestone date of said voyage, then the ship will be in serious trouble. Seafarers would sooner let their own die then harm one, since doing so would seal the Fate of the one to harm it, and probably sink the ship as well.
Their superstitions have some basis in truth. Double eagles possess a special called luckamancy reserve, which stores a variable number of points with a maximum capacity. Once the Eagle has completely filled up its reserve, it will leave the ship a luckamancy blessing and leave. It will depart even if it had previously been tamed.
Real World References
They are a reference to "an extremely rare golf score of three strokes under par on one hole, also known as an albatross". Their ties to Luckamancy are a reference to the albatross in The Rime of the Ancient Mariner.
The appearance of the double eagle is a reference to the double-headed eagle, a common heraldric symbol, today most commonly associated with Russia and its coat of arms, and historically also with the Byzantine, Holy Roman, and Austrian Empires.