You can channel your draconic ki to imbue your unarmed strikes with the essence of a dragon’s breath and to use your connection with draconic creatures to magnify your presence. You gain the following benefits:

When you damage a target with an unarmed strike, you can change the damage type to acid, cold, fire, lightning, or poison.
If you can’t already, you learn to speak, read, and write Draconic.
If you fail a Charisma (Intimidation) or Charisma (Persuasion) check, you can use your reaction to reroll the check, as you tap into the mighty presence of dragons. Once this feature turns a failure into a success, you can’t use it again until you finish a long rest.