Kraken's blood

Kraken's blood (KB, or simply blood) is a special dye used for making black items. It can be pillaged from high-level brigands and barbarians, purchased from other players or merchant brigands, making it (and black items) rare and expensive.

Spawn Locations
Unlike regular commodities, Kraken's blood cannot be bid for at a commodities market. It is spawned by both brigands and barbarians, most often imperial ranked. Kraken's blood can be won from players who are moving it (or who have previously won it in a sea battle) in PvP battles. It is rare to win more than one unit in a single battle. Kraken's blood can be won from brigands in Navy missions, but the player will not receive the Kraken's blood at the end of the mission.

Use
Kraken's blood is needed for the production of: