The Selkies saw the caverns as a perfect lair for their people and through a campaign of wit, guile, and battle displaced Searbhan's Spittle to the four winds. Over the years the mutants have taken it upon themselves to trick foolish adventurers into attacking the lower levels of the Selkies's lairs.
This has ended in blood shed more times then the mutant people care to remember. Still the mutant renegades of Searbhan's Spittle have declared a blood feud against the Selkies. And once again seek to destroy them if possible. The vessel that the PC's sail upon has a small nuclear device that the 'old man' will use if things go wrong. He does not realize that this device is actually a dud.
The Selkies wrath will not be kind at all should they find out about this item.
The Selkies will not seek revenge for any of the actions of adventurers but will sink the ship, kill any trespassers, and simply want to be left alone in peace. They feel that guarding their treasure is a sacred rite that must be carried out for the good of all.
Created during the Twilight years of the Shadow Wars, these creatures are an artificial mutant species created by a team of scientists as bio terror weapons to carry on some strange long forgotten agenda now forgotten to the ages. They were named after a Formorii warrior, a sea god who was a one eyed, one armed, and one legged fighter who guarded a magical tree.They also guarded a treasure at one time but that time is long past.
These fiends were actually in charge of a small nuclear arsenal and several bizarre military black projects during the final decades of the Apocalypse. They had a treasure trove of a hundred years of raids carried out on post apocalyptic vessels who stumbled into their waters.
The Selkies put an end to their reign of terror and have now taken to guarding their former horde for the good of all. These bizarrely appearing mutant green old men have sworn a blood oath against the Selkies and have for decades made covert war against them. They use others to carry out this war with lies, cheats, cons, and any number of acts of terror which have come to naught.