UPDATE - It's been brought to my attention, that you only need the 2 bows, 2 melee weapons, outfit, mount, and shield to be legendary to get the trophy. So Thebest sources for legendary weapons and shields in Assassin's Creed Origins are the puzzle papyrus, followed by side quests, then treasure chests, tombs and bandit camps. Includedin its wares are the Fire Sword, the companion shield, the Ceremonial Staff, and the gear you get from killing Phylakes bosses. Another thing that’s jHzt8.