Merfolk

ability score increase: +2 Cha, +1 Int or Wis

age: Merfolk mature at the same rate humans do and reach adulthood around the age of 20. They live considerably longer than humans, though, often reaching well over 100 years.

alignment: Usually Lawful, very rarely ever Evil

Size: Medium

speed: 30ft

Languages: Common, Primordial, and one other language of your choice

race features:
Amphibious. You can breathe air and water. Also, because you are adapted to even the most extreme ocean depths, you have resistance to cold damage, and you ignore any of the drawbacks caused by a deep, underwater environment. Swift Swimming. When you take the Dash action while swimming, you can move an additional 20 feet. Mermaid Tail. Whenever you are exposed to water, your legs turn into a fish tail. You cannot wear boots, pants, or anything that is worn on the legs or waist area except for belts and specially made armor. All armor you wear must be specially made to accommodate you, doubling the cost. Sparkling Aria. You know the shape water cantrip. Charisma is your spellcasting modifier.