Might of the Meek

You’ve devoted yourself to training beyond mere might and muscle and refuse to allow that to be a reason for failure. You gain the following benefits:

• Your Strength score is set to 9.  It may never go higher, though it can go lower.
• If you should fail an attack roll, you may reroll it.  If you choose to reroll in this way, you gain 1 point of exhaustion.
• If you choose to reroll an attack 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.