From The Depths. When this creature reaches half of it max hit point count it begins glowing with a radiant blue light, a ring of water octopus arms form around this creature and this creature begins glowing, when this happens this creature has access to different features and actions. 

Multiattack. Zafar can use its Tidal wave and makes two attacks, using Pierce or Trident Throw in any combination. While From The Depths is active this creature can use its restraining Tentacle and Geyser Explosion in any combination.

Pierce. Melee Weapon Attack: +5 to hit, reach 10 ft., 1 target. Hit: # (2d8 + 5) [piercing] damage.

Trident Throw. Ranged Weapon Attack: +7 to hit, range 20/120 ft., 1 target. Hit: # (2d8 + 7) [piercing] damage.

Tidal Wave. Ranged Weapon Attack: +7 to hit, range 120ft, each creature in a 35ft cube. Hit: #  (3d10 + 7) [cold] damage. All creatures hit by this attack must make a DC 15 CON saving throw, on a failed save affected creatures are knocked prone until the start of their turn.

Restraining Tentacle. Melee Weapon Attack: +8 to hit, range 35ft, 1 target. Hit: # (2d8 + 5) [cold] damage. When a creature is hit by this attack they must make a DC 15 CON saving throw, on a failed save the affected creature is restrained, at the start of each of the restrained creatures turn they can make a CON saving throw to attempt to end the effect. This attack can only be used when From The Depths is active.

Geyser Explosion. Ranged Weapon Attack: +4 to hit, range 20/100ft, each creature within a 10ft cube. Hit: # (5d10 + 7) [cold] damage. This attack can only be used when From The Depths is active.

Ambrosia (Recharge 4-5). As a bonus action this creature can take out a block of ambrosia from their pocket and take a bite, this creature regains 3d10 hit points.

Call Reinforcements (Recharge 3-4). As a bonus action this creature can call out to all Crewmates on the ship, this creature rolls 3d4's, depending on the result different crewmates will join this creature in combat. 

The rolled creatures will join the combat at the start of the next round.

Seas Call. As a reaction after you make an attack using Trident Throw you can make the trident immediately reappear in your hand.

Godblood (Recharge 9-10). As a reaction while From The Depths is active when you fail a saving throw you can choose to succeed instead.