This quest is not available in game.
Kill Ivar the Foul, and bring Ivar's Head to Rane Yorick at the Ivar Patch.
My brother Quinn and I were tasked to recon Silverpine Forest and report to High Executor Hadrec. But we didn't get far -- when moving through this farm we were attacked by the ghoul Ivar the Foul.
We escaped from Ivar, but he seriously mauled Quinn. He's healing from the potion you gave him, but Ivar may return before Quinn recovers.
Kill Ivar so Quinn will have time to heal. Ivar is usually in the barn yonder, waiting for my guard to drop.