You are a Humanoid.

You are Medium (about 5–6 feet tall)

You have a base walking speed of 30 feet.

You have Darkvision with a range of 60 feet.

You are part of a lineage that grants you supernatural abilities. Choose a lineage from the Elven Lineages table. You gain the benefit of that lineage.

Elven Lineages:
Avariel: You have a Flying speed of 25 feet, which cannot be used while wearing Medium or Heavy Armor. In addition, you have Resistance to Fire damage.
Mariana: You have a Swimming speed of 30 feet, and you can breathe in both air and water. In addition, you have a base Darkvision of 120 feet instead of 60 feet. 
Sea Elf: You have a Swimming speed of 35 feet, and you can breathe in both air and water. In addition, you have Resistance to Cold damage.

You have Advantage on saving throws you make to avoid or end the Charmed condition. In addition, you learn your choice of Dancing Lights, Elementalism, or Minor Illusion, casting it using your Constitution modifier as the spellcasting ability.

Thanks to your mystical connection to nature, you gain proficiency with two of the following skills of your choice: Animal Handling, Medicine, Nature, Perception, Stealth, or Survival.

You don’t need to sleep, and magic can’t put you to sleep. You can finish a Long Rest in 4 hours if you spend those hours in a trancelike meditation, during which you retain consciousness.

You can speak, read, and write Common and Elvish.