Some ailments can't be cured by herbs alone. You learned ritual remedies as well, calling on Nature spirits to soothe aches and ward off the Evil Eye. Taking up with adventurers has given you company on the road, as well as protection from those who would brand you a fakeor worse.
Choose two ability boosts. One must be to Intelligence or Wisdom, and one is a free ability boost.
Source: Avanced Player's Guide