Old Salt

Experienced Sailor. Advantage on Str (Athletics) checks made to climb while on a sailing ship and on Dex (Acrobatics) checks to maintain its footing while on a sailing ship.

Seaside Rejuvenation. If at least one of its accusers is still alive or if its name hasn't been cleared destroyed old salt gains new body in 13 days regaining all hp and becoming active again. New body appears on beach or dock nearest one of its living accusers.

Undead Nature. Doesn't require air food drink or sleep.

Multiattack. Two Desiccating Slam attacks.

Desiccating Slam. Melee Weapon Attack: +6 to hit, 5 ft., one creature,. 12 (2d8+3) bludgeoning damage + 7 (2d6) necrotic. Target's hp max reduced by amount equal to necrotic taken (DC 15 Con negates hp max). Reduction lasts until target finishes long rest. Target dies if effect reduces its hp max to 0.

Wave of Seawater (Recharge 5-6). Throws its hand forward sending wave of seawater in a 30' cone. Each creature in that area: 21 (6d6) bludgeoning damage and begins choking as its lungs fill with seawater (DC 15 Dex half damage and isn't choking). A creature that can breathe water doesn't choke from failing this save. A choking creature can make a DC 15 Con save at the end of each of its turns coughing up seawater and success ends effect on itself.

Cunning Action. Take Dash Disengage or Hide.