From the introduction:
When clouds cover the moon and the sea fog rolls in, the Dark Elves strike from their sleek vessels. Cloaked corsairs swing onto enemy ships or slink into remote coastal villages, the air ringing with cruel laughter heralding the sound of slaughter. They seek plunder or captives, bound for a life of misery in frozen Naggaroth.
The Corsairs of Captain Flariel are a ship-borne band of Dark Elves who harry the coasts of the Old World. Captain Flariel is a swashbuckling thrill-seeker, who lives for the excitement and unpredictability of adventure. The sorceress Rakaria seeks ancient Elven artefacts to improve her standing in the treacherous city of Ghrond. Below decks in the bowels of the Raptor’s Talon, a band of wretched captives plot an uprising against the cruel overseer Corvian Sabeth… though without help, they are doomed.
This supplement is one of a series detailing small bands of antagonists or dubious allies for your game. It provides information on Dark Elf corsairs and suggestions for how to use Flariel’s Reavers. It also includes a profile for a Dark Elf ravenship, compatible with the rules in Sea of Claws.