Swift Raider
Flight of the Stormcaller #21 (x2/x1)
(38) 3 5 4 8
Corsair.   Ship.  

Boarding 2. Cannot have attachments.

While Swift Raider is in the staging area, it gains:

Forced: After a player commits 4 or more characters to a Sailing test or to the quest, Swift Raider engages that player.