I must bend before I kill. A small version of me plays long strings in echoing chambers. I was used by Eskimo Hunter, English Yeoman, and Mongol Warrior. I was banned by a pope for use against Christians when “cross” was added to me and my shape bent to match the name. I cannot be prepared for battle or for hunt except by on stronger than my pull. I can be made of metal, horn, or wood. What am I?