You may not be the smartest or the strongest, or even the most attractive, but damnit you've seen some things in your life and they provided you with a unique perspective though oftentimes it taxes your mind and body.  You gain the following benefits:

• Your Wisdom score is set to 9.  This can never go higher though it can go lower.
• If you should fail a roll that relies on Wisdom, you may reroll it.  If you choose to reroll in this way, you gain 1 point of exhaustion.
• If you choose to reroll using this feat, you may also expend up to 2 hit dice to roll that many d4s and apply the sum to the new roll.  Do this once per turn.