Water Genasi
Ability Score Increase +2 Con, +1 Wis
Size Medium
Speed 30ft Walking, 30ft Swimming
Amphibious
You can breathe air and water.
Call to the Wave
You know the shape water cantrip. When you reach 3rd level, you can cast the create or destroy water spell as a 2nd-level spell once with this trait, and you regain the ability to cast it this way when you finish a long rest. Constitution is your spellcasting ability for these spells.
Additional Features
You can pick two additional features from the ones listed for the mortal parents race
Languages. Common, Primordial, and whatever other language the mortal parent would natively know