How to Upgrade Your Elven Iros Weapons

With elven iros I all let the crew know this so that they can kind of make a decision form with me if they would like to chip in one of them is like I get plus two bonus attack with the special arrows I get three charges. The longbow for Selena it's upgraded because I can now change who my sworn enemy is clarification on thatSo someone doesn't someone if they become your sworn enemy but don't die right I doI still have disadvantage on all the other enemies yeah once you chose a sworn enemy you have disadvantage when attacking anyone else but as a bonus action you can change who your sworn enemy is that's the whole pointYeah also knew what my sworn enemy