Well there is one answer to lock (Decoy) but also Lock may be applied at max 3 times (NG Aukes, Cleaver and Decoy on on of them) or 5 times(Sciotael Iltihne , Cleaver , Cleaver Decoyed ,Cleaver Decoyed via Natures Gift and Ilthne Eithned). Ambush cards currently has no answer but i think silver...