Barnacles live on rocks, and boats. They have a hard carapace which is their only defence system. They will attach them-selves to ships and feed of the energy in the sea and on the ship. The bigger barnacles, as well as too many, have a tangible effect on the Ships energy output and removal is advised.
Sizeable cores may increase the hull of a ship, reduce incoming hull damage or add sand resistances to the wearer.