You don't see Carrion anywhere unless you make him spawn. Go to loc 21100 6500 and kill those Phantom Wisps. After you killed them Carrion pops up, conned yellow. After you killed him , Ghostly Wisps pop up (about 4-6) and they attack you. Kill them like those Phantom ones and Carrion pops up again, now conned orange. Kill him again and Wraith Wisps pop up (about 4). Do the same like those Phantom and Ghosty Wisps and Carrion pops up AGAIN, now conned purple. But this time when you kill him , he stays down.