I just noticed that page seven of the manual, titled "what's on the map?" might have a typo.
You see, there are two large number 8 printed on the board, one on the island chart to the side, and one on the larger board pointing to the unknown area that is presumably ready for a new island.
However the text only refers to the shield number, and not the other 8. Is this a typo or something else?
Looks like a typo to me, too. The six boxes its pointing to are the spots where you put "permanent" enmity stickers during the end game sequence. My best guess is that they originally planned to point that out there, but later decided that players needed more information on enmity to make sense of it, so they took away the defintion on page 7, leaving the main description of the boxes in the enmity section on page 11.