The Devil and the Deep Blue Sea (2020)

From publisher blurb:

Like the Great Below and the many mysterious places mages roam, the ocean’s depths are seen only in glimpses, filled with wondrous and terrifying things that never see the light of day — but willworkers and the Bound have the means and the will to stare into these abysses.

Although there’s nothing kind about cutthroat pirates, the promise of equality and honor among thieves appeals to those downtrodden by the system, whether that’s the British Empire, the Diamond, or the Kerberoi.

Mage society teeters on the brink of civil war as the Silver Ladder allies with the Seers of the Throne to stamp out Nassau’s Nameless Order, while the Bound sail with their brotherhoods to stop marauding Reapers and plumb the haunted seas.

Requires the use of the Geist: the Sin-Eaters Second Edition Rulebook and the Mage: the Awakening Second Edition Rulebook.