Your Charisma score increases by 2 and your Constitution score increases by 1

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.

You can speak, read, and write Common and Deep Speech.

Your base walking speed is 30 feet.

You have a climbing speed equal to your walking speed.

Thanks to your eldritch heritage, you have superior vision in dark and dim conditions. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.

You have resistance to necrotic damage.

Your horns and claws are natural weapons, which you can use to make unarmed strikes. If you hit with them, you deal piercing damage equal to 1d6 + your Strength or Dexterity modifier, instead of the bludgeoning damage normal for an unarmed strike.

You know the spare the dying cantrip. Once you reach 3rd level, you can cast the false life spell once as a 2nd-level spell. Once you reach 5th level, you can also cast the mirror image spell once. You must finish a long rest to cast these spells again with this trait. Constitution is your spellcasting ability for these spells.

If you fall asleep while there is a Blood Moon out, you have a dream (as per the spell, save DC 16). In this dream, the Black Goat places a compulsion within your mind, ordering you to carry out some activity as a torrent of images and sensations. When you awaken, you are automatically affected by a suggestion spell (save DC 16, cast as a 7th-level spell) in addition to the effects of dream, and must carry out the order.