Following last night's revelatory episode, which you can read a recap of over on Spinoff, the CW has released a promo for next week's action-packed installment of "Arrow." The trailer teases an increase in tension between Oliver Queen and his former allies as Diggle, Black Canary and Felicity form an uneasy alliance with the Dark Archer to confront the former vigilante of Starling City. The clip also includes the first look at Rila Fukushima ("The Wolverine") as Katana, the latest DC Comics character to make the transition to the small screen. You can check out the promo as well as the episode's synopsis below.

"Arrow" airs Wednesdays on the CW.

"This is Your Sword" - (8:00-9:00 p.m. ET) (Content Rating TBD) (HDTV)

AL SAH-HIM TAKES HIS FINAL STEPS TO ASCENSION; ROY AND THEA REUNITE - Oliver/Al Sah-him (Stephen Amell) finishes his training and is left with two final tasks to become the next Ra's al Ghul. Ra's (guest star Matt Nable) threatens Nyssa (guest star Katrina Law) and delivers some shocking news. Meanwhile, Malcolm (John Barrowman) makes a surprising offer to Team Arrow and Thea (Willa Holland) goes to see Roy (Colton Haynes). Wendey Stanzler directed the episode with story by Erik Oleson and teleplay by Ben Sokolowski & Brian Ford Sullivan (#322). Original airdate 5/6/2015.