Manu Bennett’s Deathstroke takes center stage in a brand new Arrow promo titled “Everything Has Changed.” The promo is only 21 seconds long, but Bennett’s Deathstroke makes a huge impression.

Deathstroke ominously tells Stephen Amell’s Green Arrow, “You and I walk between worlds, but we can only do that for so long.”

The trailer then cuts to an apparent dream sequence of Oliver on Lian Yu where it looks like he draws his bow on his son. However, we never see exactly who he is targeting. The next scene shows Oliver hugging his son. The footage also looks very familiar to the Season 5 finale. It’s possible Oliver will be haunted by what happened on Lian Yu.

Then we leave Lian Yu and see Oliver dressed in a suit asking his son, “Where do you think the bad man is.” His son creepily raises his hand and points it directly at Oliver’s chest. It’s a scene straight out of a horror film!

Finally, we get a glimpse of Katie Cassidy’s Black Siren as she sets off an explosion and casually walks away with sparks flying behind her!

Take a look:

Stephen Amell returns as the Green Arrow on Thursday, October 12 at 9pm ET/PT on The CW. Arrow stars Emily Bett Rickards as Felicity Smoak, David Ramsey as John Diggle, Willa Holland as Thea Queen, Paul Blackthorne as Quentin Lance, Katie Cassidy as Black Siren, and more.