she heard renly begin a jest , his shadow moving , lifting its sword , black on green , candles guttering , shivering , something was queer , wrong , and then she saw renly 's sword still in its scabbard , sheathed still , but the shadowsword ... `` cold , '' said renly in a small puzzled voice , a heartbeat before the steel of his gorget parted like cheesecloth beneath the shadow of a blade that was not there .