Question: how can elrond fight the nazgul?
Answer: Elrond seems to use his Ring of Power along with his Elven-sword in dueling the Nazgûl. Saruman uses ninja-like skills involving his staff and magical bursts to beat the Ringwraiths. The two of them attempt to dismember the Nazgûl and knock them off the fortress walls, although the wraiths keep regenerating.