Things are getting tense for the inhabitants of Starling City as their lead vigilante, Oliver Queen, steps into his new role as the leader of the League of Assassins. Following the events of last night's "Arrow" episode, which you can find a recap of over on Spinoff, it looks like team Arrow will use every weapon in their arsenal to win Oliver back from the clutches of Ra's al Ghul. Judging by this promo, one of those weapons includes Black Canary's new Canary Cry.

You can check out the promo as well as the synopsis for "Al Sah-Him" below. "Arrow" airs Wednesdays on the CW.

THE LEAGUE OF ASSASSINS SETS THEIR SITES ON NYSSA - Oliver (Stephen Amell) goes through a rigorous transformation. The League of Assassins sets their sites on Nyssa (guest star Katrina Law), who is back in Starling City training Laurel (Katie Cassidy). When Nyssa realizes they are coming, she arms up to face them alone but Laurel asks Felicity (Emily Bett Rickards) and Diggle (David Ramsey) to help protect her new friend. Thor Freudenthal directed the episode with story by Beth Schwartz and teleplay by Brian Ford Sullivan & Emilio Ortega Aldrich (#321). Original airdate 4/29/2015.