You gain Inspiration when you give the corpse of a friend or enemy a water burial.

You can breath underwater and have the ability to communicate in a limited manner with aquatic beasts. They can understand the basic meaning of your words and you can understand simple responses. Additionally, you can cast 

 once per long rest without material components. When the wall of water is conjured, it appears as foaming ocean wave containing shadows of aquatic creatures swimming inside.

When you successfully hit a creature with a melee or ranged attack, you can use a bonus action to push them back 15 feet. If this causes the creature to be pushed against a wall or solid object, they take 1d6 bludgeoning damage. Pushing a creature this way conjures a spray of water that smells strongly of saltwater.

You may spend an inspiration die to transform yourself into a water elemental myrmidon. Additionally, you can spend an inspiration die to summon a water elemental as per the 

Followers of Poreios

Devotee

Votary

Disciple

Champion