Tiefling (Levistus)

Hellish Resistance. You have resistance to fire damage.   Legacy of Stygia. You know the ray of frost cantrip. When you reach 3rd level, you can cast the Armor of Agathys spell as a 2nd-level spell once with this trait and regain the ability to do so when you finish a long rest. When you reach 5th level, you can cast the darkness spell once with this trait and regain the ability to do so when you finish a long rest. Charisma is your spellcasting ability for these spells.

Languages. Common, Infernal