Your type is Fiend.

Your Charisma score increases by 2, your dexterity by one

You have a walking speed of 30ft.

You count as a Tiefling for the purposes of qualifying for Tiefling Racial Feats.

You have advantage on saving throws against spells and other magical effects.

You may communicate telepathically with a creature you can see within 60ft of you, and they speak telepathically to you in return. You must share a language with the creature you are attempting to communicate with.

You can speak, read, and write in Common. You also gain an additional language based on your subrace: Infernal for Devils

Once per long rest, you may use an action to strike a contract with a willing creature who can see and hear you.
Both sides most agree to the conditions, which involves both of you spending your highest available hit dice and loosing hp equal to a roll of it.
The contract lasts until your next long rest, and while under its effects:
When either you or the creature you struck the contract with, miss an attack or fail a saving throw while within 60 ft of each other, either creature may use their reaction to add 3 to the roll, potentially making an attack hit or turning a failed saving throw into a success.
After a creature uses this feature, it must spend another hit dice and take damage again, as part of the reaction from any subsequent use.

Inherently Compelling: At 5th level, your persuasiveness and your infernal heritage have coalesced into magic for you to use.
You learn the spells Command and Suggestion, and you can cast each of these spells without expending a spell slot.
Once you cast either of these spells in this way, you can't cast that spell in this way again until you finish a long rest.
You can also cast these spells using spell slots you have of the appropriate level. Choose Intelligence, Wisdom, or Charisma as the spellcasting ability for these spells.