So was doing a podcast researcher on the hidden blade, and I think I have found a discrepancy. When you play as haythem he clearly uses a piviot blade wich was handed to him by Miko, and also Achilles was the one who handed Conner the hidden blade. So shouldn't the lore read "famous users; Conner, haythem and Achilles" not sure if Achilles did use it but he did give it to Conner