Revenants

Having met a cruel and undeserved end, you have returned to the realm of the living. As a revenant, you thirst for revenge against those who wronged you in life, or seek to complete a final, critical task you left unfinished. This race can be applied to any existing race with the addition of the following traits.
Ability score Increase: Your constitution score increases by 1
Relentless Nature: You have a single goal that keeps you alive, whether it is vengeance, liberation of a people, or some other task. You have 1 year from the time of your awakening as a Revenant to complete this goal or die completely. You also gain the following benefits:

• If you are below half your hit point maximum at the start of your turn, you regain 1 hit point.
• If you die, you return to life 24 hours after death. If your body is destroyed, you reform within 1 mile of the place of your death spot, determined by the DM. This may mean your spirit of vengeance taking taking host in an already existing corpse (gaining their racial abilities alternatively).
• You know the distance and direction between you and any creature involved in your goal, such as a person you seek vengeance against or someone you pledged to defend. This awareness fails if the creature is on another plane of existence. 

When your goal is complete, you finally find rest. You die and cannot be restored to life. You follow the standards of any culture you were apart in life, though many previous values seem dim in comparison to your current goal.