The black dread gets slayed and you can feel the joy of the imprisoned druids when their souls get released. They sweep over this evil dimension and bring back the colors. But though this dimension is so drained that it will not host life for another millenium. You better hurry back to Merelix and tell him the good news. Congratulations! You have just completed Stonehenge! You receive 32727 gold as a reward for completing the quest. You utter a prayer for the fallen foe 'In nomine Faerwon. Amen.'