As your father commands all things beneath the sea, you’ve been given the innate ability to speak and understand up to 3  languages spoken to you per day as well as translate for both yourself and your company.

As the child of Poseidon, the flow of any water or liquid bend to your will. With any liquid larger than a pint, you can choose to redirect, slow, speed up, make harder or soften Calm, stir reshape and even surf. 

 When you or your comrades are near been injured or incapacitated, you may heal yourself up to 1d100 or instantly return the incapacitated part to 5hp after 1 round.

Three times per long rest, you may whistle a song of respite. By whistling this song (which cannot be interrupted) you impose disadvantage on those you see as beneath you or worth crushing into dust. This song counts as a song of strength. You may add +5 to all damage you deal.(+5 per song, up to +15 dmg)

When using a weapon that deals bludgeoning or piercing dmg, you may force up to 2d4 gallons of water into your opponent or remove up to 1d8 Liters of blood or fluids from them

As a result of your near godly physique, you can force you enemy to reroll their hit dice, should they land an attack that surpasses your AC 

As your father’s weapon of choice was a trident, It is only natural that you have proficiency with it as well. Like your father, your score up deliver a dozen blows in the blink of an rut. You are so in tuned with tridents, that you may Imbue any weapon you use with a manifested trident points into it.

You have absolute dominion over all hydrating or viscous liquids around you to the point you may pull the moisture from the air or plant life to form barriers and projectiles

Unleash your trident in a flurry a blindingly fast sided (up to 20 hits) You may only use this attack with your manifested trident and cannot be blocked, only dodged. (Opponent must roll 4d20: their AC to dodge all strikes

You leap into the air and rain down your amphrite attack

 Ariel Amphrite

You force a geyser of water from your hand at a range of 5 ft and those hit by the water take 2d4 Force damage

As with riptide, you force a stream of water from your hands as an attack, however, this is directed upwards towards skyward or leaping foes.

You deconstruct your molecular composition into a floating sentient ball of water and charge forward at your enemy, submerging them in your water and throw them back (2d4 Force) a few feet or slam them to the ground (3d8 Bludg.) with enough force to shatter some bones

You make a small shield of water and slide back as if to dodge an attack, then glide forward on a wave of your manifested water to slam the shield against your foes chest (3d8 bludg.)

You maintain your physical molecular structure but have converted your being into a water statue. You can use this action 3 timer per short rest and 5 per long rest to free yourself from being grappled or restrained or to let an attack that hits to miss

Shoot a ball of water from your hand and on contact detonate or with either a wave of force or an Amphrite. Or you may transform the ball into a hand to pull your foe up to 10 ft closer. 

Slam your trident or fist against the ground and force all within 15ft to be gripped and thrown by all the moisture from the plant life around you.(4d6 Force dmg)

By your heritage and control of water, you passively apply a level of exhaustion to everyone you hit with your manifested water as it drenched and gloms into them. Apply 1 level of exhaustion to any creature you hit with more than 1 gallon of water.

Summon up to 3 storm clouds to strike and immobilize your foes. The clouds last 3 rounds each and when summoned travel at a speed of 10 ft per round. You can summon all three around a person but never directly over a person.(3d8 Lightning dmg)

Make 4 geyser boosts from the ground to propel both you and an enemy within 10 ft from you, into the air to damage and attack them. (2d10 Force dmg)

Rain Check: Restrain your enemy with water, (4Lv Exhaustion) You kick them violently with whirlpools of water and fling them high into the air and charge up to them to deliver a viscous running through with your trident. You spin them around and some them back into the ground. You then pull blood from their open wounds and turn them into daggers to stab them through their vitals 

Eye-Solated:  Form a saw blase of water and throw it through your enemies waistline, cutting them in half and form a geyser spout that strips the flesh from their bodies until their eyes pop out. You then force dissect the. Once more and catch their eyes younger and brain in a ball of water you hold in your hand.

Power Wash: Use a geyser kick to send your opponent flying and force geyser spouts from your hand blowing through their skulls and chest  and then split them in half on both the X & Y axis from those spots