Idk why people are so insulting towards you. In vanilla I broke down my Atheons episode by accident. Once they added the ability to lock gear I now lock everything. Bungie definitely should make it possible to get it back. They have exotic blueprints in the tower which is essentially the same concept. Why can't we just replay the mission and get the sword back? Throw it in the blueprints because there are only 3 legendary swords? Idk just seems like a simple fix.