Instead of the typical Tiefling traits, tieflings may instead display one of the following traits, although Devil’s Tongue, Hellfire, and Winged are mutually exclusive.

Devil’s Tongue
You know the Vicious Mockery cantrip. When you reach 3rd level, you can cast the Charm Person spell as a 2nd-level spell once with this trait. When you reach 5th level, you can cast the Enthrall spell once with this trait. You must finish a long rest to cast these spells once again with this trait. Charisma is your spellcasting ability for them. This trait replaces the Infernal Legacy trait.

Hellfire
Once you reach 3rd level, you can cast the Burning Hands spell once per day as a 2nd-level spell. This trait replaces the Hellish Rebuke spell of the Infernal Legacy trait.

Winged
Bat-like wings jut from your shoulder blades. You have a flying speed of 30 feet while you aren’t wearing heavy armor.