After yesterday's photos gave us our first look at Katrina Law as Nyssa al Ghul in Arrow, a new promo for next week's "Heir to the Demon" shows this deadly character in action. Nyssa, the daughter of The League of Assassins leader Ra's al Ghul, comes to Starling City to bring Sara, a.k.a. The Black Canary (Caity Lotz) back to the fold. Watch what happens when a deadly assassin like Nyssa is scorned, debuting Wednesday, February 5 at 8 PM ET on The CW Network.

As Laurel (Katie Cassidy) continues to unravel, Oliver (Stephen Amell) and Lance (Paul Blackthorne) try to convince Sara (guest star Caity Lotz) to stay in Starling City and finally reunite with Laurel and Dinah (guest star Alex Kingston). However, Sara's fellow League of Assassins member, Nyssa (guest star Katrina Law, Spartacus), comes to bring Sara back to the fold, but when Sara refuses, Nyssa kidnaps Dinah. Realizing she's putting her family in danger by staying in town, Sara considers re-joining the league.

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