User blog comment:Garr9988/Episode Ideas/@comment-25175617-20170328184853/@comment-25175617-20170402185913

Scalec: I did give Alexander an origin based around protecting the Minoan Trident and discovering artifacts existed on the WH1 page. But that can be explored further or altered as you see fit.

Garr: I chose 16 artifacts because the Minoan emblem is a 16 pointed star or Sun and as stated above, when creating the WH1 origin/logo I based it around the Minoan Trident. So as a possible thread for future stories, there's the idea of 16 truly dangerous artifacts to come into being.

As for Aether as the 5th emement, early Greeks did believe it in, but by the 330s BCE the works of Empedocles and Plato had already been touting 4 elements. I'm not certain what the Ancient Macedonians would have believed, but it would likely reflect the Ancient Greeks of the time.