Why Aatrox has been in seen in major conflicts throughout history

I don't know if others have already thought of this, but after the reveal of Kayn and Rhaast I had a thought. The Darkin as weapons are immortal but their hosts' bodies are not. In Aatrox's lore, it is said that he has personally been a major influence in many conflicts throughout all of recorded history. My thought on this is that during every major conflict, different nations, tribes, guilds, etc. all search for every advantage they can get. They find a sword that gives them immense power and bring it into battle and then over time Aatrox takes over the warrior's body thus allowing him to emerge during every war throughout history.