You add detect magic and scrying to your class's spell list, if it has one. You may cast detect magic once per day without using a spell slot. You may cast it additional times per day at the cost of a 1st level spell slot or 1d6 points of necrotic damage. You may cast [spell]scrying[/scrying] once per day without using a spell slot, but only lasts 1d6 rounds. You may cast it additional times per day at its full power at the cost of a 5th level spell slot or 5d6 necrotic damage.

Your Intelligence score increases by 1, and your Charisma score increases by 2.

Tieflings mature at the same rate as humans but live a few years longer.

Tieflings are about the same size and build as humans. Your size is Medium.

Your base walking speed is 30 feet.

After you long rest, choose an elemental resistance type: acid, cold, fire, lightning, or thunder. You gain resistance to that damage type until you finish a long rest.

You know the thaumaturgy cantrip. When you reach 3rd level, you can cast the hex 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 or misty step 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.

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