 Carey 's final run followed the attempts of John 's three new children attempting to kill all of his family and friends , culminating in the death of his sister , <unk> , at the hands of her possessed husband . John then travels into Hell to try to rescue her soul , with the assistance of Rosacarnis ' father , Nergal . The plan ultimately fails , and John returns broken , and intending to renounce magic . 
