AerialistAdventure: Extinction Curse
Experienced with trapezes, aerial silks, and hoops, your skill is in Performing death-defying stunts high above the ground. The Celestial Menagerie skimped on safety devices such as nets and quality ropes, so you also learned to take a fall better than most. After a harrowing near-death experience involving a cracked trapeze bar, you decided to take your expertise elsewhere.
Choose two ability boosts. One must be to Dexterity or Charisma, and one is a free ability boost.
Source: Extinction Curse Player's Guide pg. 4