You gain the following benefits:
Ability Score Increase. Increase your Dexterity, Intelligence, Wisdom, or Charisma ability score by 1, to a maximum of 30.
Good Luck. Immediately after you roll a d20 for a d20 Test, you can roll a d10 and add the number rolled to the test. Once you use this benefit, you can’t use it again until you roll Initiative or finish a Short Rest or a Long Rest.