Blood Frenzy. The high priestess has advantage on melee attack rolls against any creature that doesn’t have all its hit points.

Limited Amphibiousness. The high priestess can breathe air and water, but she needs to be submerged at least once every 4 hours to avoid suffocating.

Shark/Orca Telepathy. The high priestess can magically command any shark within 120 feet of her, using a limited telepathy.

Echolocation. Can still see even if blinded.

Spellcasting. The shorka priestess is a 7th-level spellcaster. Her spellcasting ability is Wisdom (spell save DC 14, +6 to hit with spell attacks). She has the following cleric spells prepared:

Cantrips (at will): guidance, mending, resistance, thaumaturgy

1st level (4 slots): bless, detect magic, guiding bolt

2nd level (3 slots): hold person, spiritual weapon (trident)

3rd level (3 slots): bestow curse, fear, mass healing word, tongues

4th level (1 slots): banishment

Multiattack. The shorka priestess makes two attacks with her toothsome staff, or one attack with her bite, tail or one with her claws.

Toothsome Staff. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 11 (2d8 + 2) piercing damage.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 4 (1d4 + 2) piercing damage.

Tail. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d4 + 3)bludgeoning damage.

Claws. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 4 (1d4 + 2) slashing damage.

Whirlpool (2/day). The wave shaper targets a body of water at least 50 feet square and 25 feet deep, causing a whirlpool to form in the center of the area. The whirlpool forms a vortex that is 5 feet wide at the base, up to 50 feet wide at the top, 25 feet tall, and lasts for 1 minute or until the wave shaper is incapacitated. Any creature or object in the water and within 25 feet of the vortex is pulled 10 feet toward it. A creature can swim away from the vortex by succeeding on a DC 14 Strength (Athletics) check.

When a creature enters the vortex for the first time on a turn or starts its turn there, it must make a DC 14 Strength saving throw. On a failed save, the creature takes 9 (2d8) bludgeoning damage and is caught in the vortex until it ends. On a success, the creature takes half damage and isn’t caught in the vortex. A creature caught in the vortex can use its action to try to swim away from the vortex as described above, but it has disadvantage on the Strength (Athletics) check to do so.

The first time each turn that an object enters the vortex, the object takes 9 (2d8) bludgeoning damage. This damage occurs each round it remains in the vortex.