Doppelganger's Deceit

You have developed traits reminiscent to that of a Doppelganger, granting you the following benefits:

• Increase your Dexterity or Charisma by 1, to a maximum of 20.
• You gain expertise in Deception. If you were already proficient in Deception you also gain proficiency in Insight.
• In the first round of combat, you have advantage on attack rolls against any creature that is surprised.