Take a look at the special abilities for your crew and choose one. If you can't decide which one to pick, go with the first one on the list—it's placed there as a good default choice. It's important to pick a special ability that everyone is excited about. You can get more special abilities in the future by earning xp.

Just like picking the crew type, reputation, lair, and hunting grounds, choosing a special ability is another chance to focus the game down to a more specific range of possibilities. That's a lot to work with, and it helps get the game going in a strong direction from the very beginning.