The Missing Brother Series

The Sacrificial Stone:

 After the Captured Haduk gives the reward for Rescue Mission to the Nuk-Nuk he will be available to give this quest:

Go North to this location:

When you enter through the gate into the small village area you will be attacked by a group of Nuk-Nuks, lead by their high priest:

When they are all dead and it is safe speak to the haduk man standing in front of a gazebo like building. He will give your final reward:

Your reward is 1 skill point!