Arrow has changed dramatically since its debut in 2012. Originally meant to be a grounded, Dark Knight trilogy-style take on Green Arrow, the show has since spawned spinoffs The Flash and Legends of Tomorrow, and is one piece of a world littered with superpowered people. Season 3 expanded on its comic book roots by introducing mysticism through Ra’s al Ghul and the League of Assassins, and when the show returns in October, fans will see magic playing a more important role.
During the press round tables at San Diego Comic-Con, Arrow star Stephen Amell was asked about challenges his character will be facing in Season 4, and he said it will delve more into magic both in the present day and the flashbacks. According to Amell:
"So, what we are dealing with this year, and I wouldn’t say it’s as concrete a theme as we had last year, when it’s like, what’s the theme? Identity. An element that we are introducing this year is magic, mysticism, and Oliver alludes very early on this season that this is something that he has seen before, so clearly that will play into this year’s flashbacks for him, but it’s an interesting wrinkle".
Amell also added that he suspects these magical developments will affects the other major characters as well.