Last ditch effort

You may use this feat when you are at a quarter of your max health to do 1 of the following effects.

Up your strength or dexterity score to 20, for 18 seconds

Double your speed, for 1 minute

Use one hit die

Make your next attack automatically be a crit

Make your next damage roll or healing roll be max damage/healing

After you use this feat you gain one point of exhaustion and you can't use it in till 1d20+5 days has passed.