Captain Swayne

Dirty Fighting: (2/short rest) If one pirate's attacks hits the enemy, he can choose as a bonus action to trip or disarm the target.

Sea Prowess: Captain Swayne has advantage on acrobatics and athletics checks that involve movement on a ship and in swimming checks.

Tool Proficiency: Captain Swayne is proficient with Vehicles (sea).

Multiattack. Captain Swayne makes four weapon melee attacks or four ranged attacks.

Scimitar. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) slashing damage. 

Shortbow. RangedWeapon Attack: +5 to hit, range 80/320 ft., one target. Hit: 6 (1d6 + 3) piercing damage.

Breath Weapon. Captain Swayne exhales a breath 30ft in a straight line (Dex Save) that deals Acid damage, dealing 2d6 acid damage on a failed save, half on a successful one.

Longsword of the Shadowed Depths. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 5 (1d10) slashing damage.

• Sufficient Sacrifice. Once a day, when a wielder makes three consecutive successful attacks with this weapon, they choose from two effects - almost as if the sword is linked to some strange ocean diety.

• Under Pressure. This effect causes the creature who suffers the third attack to feel the pressure of vast amounts of water bearing down on them. Under this magical pressure, they take 3d10 force damage and are knocked prone.

• Darkness of the Deep. This effect causes the creature who suffers the third attack to be blinded for 1 minute. During this time they see only darkness, as if trapped deep below the waves. They can make a DC 15 Wisdom save at the start of each turn to try and shake off the illusion.