The peoples of the oceans have achieved an unprecedented degree of sophistication. The political crisis in their senate does not threaten the sustainability of their culture. But from depths the deviations are lifted. The Léviathan extension plunges you into this new facet of the Abyss game! A new track replaces the threat line: the border. This is where these Titans rot. To fight them, gather allies. The enemy has three numbered bearings, to match and exceed when a dice jet is taken. The allies that the extension introduces have useful capabilities. Every dice jet demands an allied sacrifice - the gain is up to expectations. Shooting down deviations is a necessity. If the stake is empty, the part ends New mechanics, new lords, the scourge figure and more risky strategic choices: the Léviathan extension offers all this and throws an unprecedented atmosphere on the parts of the abyss.